A Phase 1 interventional study of Autologous Anti-CD83 CAR T-cells and Biospecimen Collection in Recurrent Acute Myeloid Leukemia and Refractory Acute Myeloid Leukemia, sponsored by Roswell Park Cancer Institute. Recruiting at 1 site in United States. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2026-10-27.
Sponsored by Roswell Park Cancer Institute · Phase 1, Interventional, and Treatment
This phase I trial tests the safety, side effects, and best dose of genetically engineered cells (CD83 chimeric antigen receptor [CAR] T cells) in treating patients with acute myeloid leukemia (AML) that has come back after a period of improvement (relapsed) or has not responded to previous treatment (refractory). CD83 is a protein that is found on AML blasts. Blasts are abnormal immature white blood cells that can multiply uncontrollably: filling up the bone marrow and preventing the production of other cells important for survival. CD83 CAR T cells represent a new cell therapy to eliminate AML blasts, while avoiding the risk for graft versus host disease (GVHD) after stem cell transplant to replace bone marrow or, tumor toxicity like myeloid aplasia where the body's own immune system causes damage to the bone marrow stem cells. Therefore, human CD83 CAR T cells are a promising cell-based approach to preventing two critical complications of stem-cell transplant - GVHD and relapse. Giving CD83 CAR T cells may be safe, tolerable, and/or effective in treating patients with relapsed or refractory AML.
PRIMARY OBJECTIVE:
I. To evaluate the safety and determine the maximal tolerated dose (MTD) of autologous anti-CD83 CAR T-cells (CD83 CAR T cells) administered as a single infusion to refractory/relapsed acute myeloid leukemia (AML) patients.
SECONDARY OBJECTIVES:
I. To observe and record activity against AML. II. To evaluate response for AML using 2022 European Leukemia Net (ELN) criteria.
III. To evaluate progression-free and overall survival after CAR T cell infusion.
IV. To evaluate the time to hematological recovery after CAR T cell infusion. V. To evaluate in vivo CAR T cell expansion and persistence. VI. To evaluate acute GVHD within 6 weeks after infusion of CAR T cells in patients who relapsed after allogeneic hematopoietic cell transplantation (HCT).
VII. To evaluate the incidence of cytokine release syndrome (CRS) and immune effector cell-associated neurotoxicity syndrome (ICANS).
EXPLORATORY OBJECTIVES:
I. To evaluate the relationship between cytokine expression and cytokine release syndrome (CRS).
II. To determine predictors of response and mechanisms or resistance to CAR-T cells.
III. To evaluate immune effects by CD83 CAR T cells on peripheral blood T cell subsets, B cells and dendritic cells.
IV. To evaluate the relationship between baseline levels of CD83 expression on AML blasts and response following CAR T cell infusion.
V. To evaluate the relationship between proportion of infused CAR T cell subsets (γδ T cells versus [vs.] αβ T cells) and disease response.
VI. To evaluate immunity after CAR T cell infusion. VII. To determine the rate of successful manufacturing and time required to complete.
VIII. To evaluate for CAR T phenotype, exhaustion, and CAR versus non-CAR subsets associated with response and relapse.
IX. Evaluate the effect of CAR T infusion on quality of life.
OUTLINE:
Patients undergo leukapheresis to obtain peripheral blood mononuclear cells (PBMCs) for CD83 CAR T cell product manufacturing on day -21 and may receive hydroxyurea at the discretion of the treating physician on study. Patients then receive fludarabine intravenously (IV) over 30 minutes and cyclophosphamide IV over 2 hours on days -5 to -3 in the absence of disease progression or unacceptable toxicity. Patients then receive CD83 CAR T cells IV over 15 minutes on day 0. Patients also undergo echocardiography (ECHO) and chest x-ray during screening, blood sample collection throughout the study, and computed tomography (CT) and/or positron emission tomography (PET), as well as lumbar puncture as clinically indicated. In addition, patients may undergo bone marrow aspiration throughout the study.
After completion of study treatment, patients are followed up every 2 weeks for 2 months then at 3, 6, and 12 months.
3,667 studies on the registry are indexed under Leukemia, Myeloid, Acute; 816 are open to participants now.
This study's planned enrollment of 26 is below the median of 40 across 3,005 interventional studies indexed under Leukemia, Myeloid, Acute.
Browse Leukemia, Myeloid, Acute studies →Roswell Park Cancer Institute is the lead sponsor of 419 studies on the registry; 65 are open to participants now.
Of its 38 completed or terminated interventional studies of FDA-regulated products, 21 (55%) have results posted.
Counted across the registry records on this site, refreshed daily.
The criteria were revised on the registry on Oct 27, 2026. See what changed
Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.
AML.This can include detection of AML by morphologic, flow cytometric, or molecular means.(20).
Exclusion Criteria:
Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
A 0–100 scale of how well someone can carry out everyday activities. 100 is no complaints and no signs of illness; 70 is able to look after yourself but not to work or keep up normal activity; 50 is needing considerable help and frequent medical care.
Studies often ask for 60 or 70 and above. Your doctor gives the score.
Relapsed: the illness came back after treatment had worked. Refractory: it did not respond to treatment, or stopped responding while still on it.
How quickly the kidneys clear creatinine, a waste product, from the blood. A study may estimate it from a blood test with age, weight and sex (often by the Cockcroft–Gault formula), or measure it using blood and urine collected over a set time. Given in mL/min; higher is better.
A yellow substance made when red blood cells are broken down, which the liver clears. A high level can mean a problem with the liver or the bile ducts.
Criteria often allow more for people with Gilbert’s syndrome, a harmless inherited condition that raises bilirubin.
Two enzymes measured in a routine blood test of the liver. Higher levels can mean the liver is under strain or damaged. SGPT and SGOT are older names for ALT and AST.
Criteria usually give a limit as a multiple of the upper limit of normal (ULN), often higher when cancer has spread to the liver.
The top of the normal range for a blood test, as set by the laboratory that runs it. Each lab prints its own range next to your result.
“≤ 2.5 × ULN” means the result can be up to two and a half times that top value.
The share of blood the heart’s main pumping chamber (the left ventricle) pushes out with each beat, measured by an echocardiogram (heart ultrasound) or a MUGA scan. About 50–70% is normal.
The study doctor’s estimate of how long someone is likely to live. Criteria use it so that people can stay in the study long enough for it to answer its question.
Able to become pregnant: from the first period until menopause, unless permanently unable to through surgery (removal of the womb, or of both ovaries or both fallopian tubes).
Criteria for people of childbearing potential usually ask for a negative pregnancy test and for contraception during the study and for a time after it.
Periods have stopped for good: usually no period for 12 months in a row without another medical reason, sometimes confirmed by a blood test (FSH).
Stem cell (bone marrow) transplants. Allogeneic uses cells from a donor; autologous uses your own cells, collected earlier and given back.
A weakened immune system. It can come from an illness, such as HIV or some blood cancers, or from medicines that turn the immune system down, for example after an organ transplant or for an autoimmune disease; steroids at higher doses count.
Read whether the line is about a condition or about medicines, and which medicines and doses it means.
After a transplant from a donor, the donor’s immune cells attack the recipient’s body, often the skin, gut or liver.
Ways of preventing pregnancy. “Highly effective” methods fail less than 1% of the time a year when used correctly — for example an IUD or an implant.
Criteria usually say which methods count and how long to keep using them after the last dose, sometimes for male participants too. Some studies accept a partner’s vasectomy if it was confirmed successful and that person is the participant’s only sexual partner.
A drug or device being studied in a clinical trial.
It may be new, or already approved and being studied for another use, dose or form. Criteria often leave out people who took part in another study of one within a recent period, commonly 30 days or five half-lives.
Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.
You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.
Anti-inflammatory medicines such as prednisone, prednisolone and dexamethasone — not the anabolic steroids used for muscle.
Studies differ in what they allow: check which steroid medicines, routes (tablets, injections, creams, inhalers, eye drops) and doses this study accepts.
The human immunodeficiency virus, which weakens the immune system.
Many studies now accept people whose HIV is controlled on treatment, judged by the viral load and the CD4 count. Check the limits this study sets.
Hepatitis B is a virus that infects the liver. These are separate tests: HBsAg positive usually means a current infection (a recent vaccination can briefly cause it too); total anti-HBc (HBcAb) positive means an infection now or in the past; HBV DNA measures how much virus is in the blood.
Some studies accept a past infection if HBV DNA is undetectable, sometimes with antiviral medicine during the study. Check what this study allows.
Malignancy means cancer. Criteria about another or earlier malignancy ask whether you have had a different cancer, usually within a set number of years.
Some are commonly allowed, such as treated skin cancers other than melanoma and early cancers removed completely — check the exceptions this study lists.
A condition in which the immune system attacks the body’s own tissues, such as rheumatoid arthritis, lupus, psoriasis, type 1 diabetes or inflammatory bowel disease.
Immunotherapy studies often leave out active autoimmune disease, and some name exceptions, such as thyroid disease on replacement hormone. Check the exceptions this study lists.
Karnofsky performance status (KPS)
A 0–100 scale of how well someone can carry out everyday activities. 100 is no complaints and no signs of illness; 70 is able to look after yourself but not to work or keep up normal activity; 50 is needing considerable help and frequent medical care.
Studies often ask for 60 or 70 and above. Your doctor gives the score.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Relapsed and refractory
Relapsed: the illness came back after treatment had worked. Refractory: it did not respond to treatment, or stopped responding while still on it.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Creatinine clearance (CrCl)
How quickly the kidneys clear creatinine, a waste product, from the blood. A study may estimate it from a blood test with age, weight and sex (often by the Cockcroft–Gault formula), or measure it using blood and urine collected over a set time. Given in mL/min; higher is better.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Bilirubin
A yellow substance made when red blood cells are broken down, which the liver clears. A high level can mean a problem with the liver or the bile ducts.
Criteria often allow more for people with Gilbert’s syndrome, a harmless inherited condition that raises bilirubin.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
ALT and AST (liver enzymes)
Two enzymes measured in a routine blood test of the liver. Higher levels can mean the liver is under strain or damaged. SGPT and SGOT are older names for ALT and AST.
Criteria usually give a limit as a multiple of the upper limit of normal (ULN), often higher when cancer has spread to the liver.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
ULN (upper limit of normal)
The top of the normal range for a blood test, as set by the laboratory that runs it. Each lab prints its own range next to your result.
“≤ 2.5 × ULN” means the result can be up to two and a half times that top value.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
LVEF (left ventricular ejection fraction)
The share of blood the heart’s main pumping chamber (the left ventricle) pushes out with each beat, measured by an echocardiogram (heart ultrasound) or a MUGA scan. About 50–70% is normal.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Life expectancy
The study doctor’s estimate of how long someone is likely to live. Criteria use it so that people can stay in the study long enough for it to answer its question.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Childbearing potential
Able to become pregnant: from the first period until menopause, unless permanently unable to through surgery (removal of the womb, or of both ovaries or both fallopian tubes).
Criteria for people of childbearing potential usually ask for a negative pregnancy test and for contraception during the study and for a time after it.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Postmenopausal
Periods have stopped for good: usually no period for 12 months in a row without another medical reason, sometimes confirmed by a blood test (FSH).
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Allogeneic and autologous transplant
Stem cell (bone marrow) transplants. Allogeneic uses cells from a donor; autologous uses your own cells, collected earlier and given back.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Immunosuppression
A weakened immune system. It can come from an illness, such as HIV or some blood cancers, or from medicines that turn the immune system down, for example after an organ transplant or for an autoimmune disease; steroids at higher doses count.
Read whether the line is about a condition or about medicines, and which medicines and doses it means.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
GVHD (graft-versus-host disease)
After a transplant from a donor, the donor’s immune cells attack the recipient’s body, often the skin, gut or liver.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Contraception
Ways of preventing pregnancy. “Highly effective” methods fail less than 1% of the time a year when used correctly — for example an IUD or an implant.
Criteria usually say which methods count and how long to keep using them after the last dose, sometimes for male participants too. Some studies accept a partner’s vasectomy if it was confirmed successful and that person is the participant’s only sexual partner.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Investigational drug or device
A drug or device being studied in a clinical trial.
It may be new, or already approved and being studied for another use, dose or form. Criteria often leave out people who took part in another study of one within a recent period, commonly 30 days or five half-lives.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Informed consent
Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.
You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Corticosteroids (steroids)
Anti-inflammatory medicines such as prednisone, prednisolone and dexamethasone — not the anabolic steroids used for muscle.
Studies differ in what they allow: check which steroid medicines, routes (tablets, injections, creams, inhalers, eye drops) and doses this study accepts.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
HIV
The human immunodeficiency virus, which weakens the immune system.
Many studies now accept people whose HIV is controlled on treatment, judged by the viral load and the CD4 count. Check the limits this study sets.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Hepatitis B tests
Hepatitis B is a virus that infects the liver. These are separate tests: HBsAg positive usually means a current infection (a recent vaccination can briefly cause it too); total anti-HBc (HBcAb) positive means an infection now or in the past; HBV DNA measures how much virus is in the blood.
Some studies accept a past infection if HBV DNA is undetectable, sometimes with antiviral medicine during the study. Check what this study allows.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Cancer (malignancy)
Malignancy means cancer. Criteria about another or earlier malignancy ask whether you have had a different cancer, usually within a set number of years.
Some are commonly allowed, such as treated skin cancers other than melanoma and early cancers removed completely — check the exceptions this study lists.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Autoimmune disease
A condition in which the immune system attacks the body’s own tissues, such as rheumatoid arthritis, lupus, psoriasis, type 1 diabetes or inflammatory bowel disease.
Immunotherapy studies often leave out active autoimmune disease, and some name exceptions, such as thyroid disease on replacement hormone. Check the exceptions this study lists.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Patients undergo leukapheresis to obtain PBMCs for CD83 CAR T-cell product manufacturing on day -21 and may receive hydroxyurea at the discretion of the treating physician on study. Patients then receive fludarabine IV over 30 minutes and cyclophosphamide IV over 2 hours on days -5 to -3 in the absence of disease progression or unacceptable toxicity. Patients then receive CD83 CAR T-cells IV over 15 minutes on day 0. Patients also undergo ECHO and chest x-ray during screening, blood sample collection throughout the study, and CT and/or PET, as well as lumbar puncture as clinically indicated. In addition, patients may undergo bone marrow aspiration throughout the study.
Drug: Autologous Anti-CD83 CAR T-cells · Procedure: Biospecimen Collection · Procedure: Chest Radiography · Procedure: Computed Tomography · Drug: Cyclophosphamide · Procedure: Echocardiography · Drug: Fludarabine Phosphate · Drug: Hydroxyurea · Procedure: Leukapheresis · Procedure: Lumbar Puncture · Procedure: Positron Emission Tomography · Other: Questionnaire Administration
Given IV
Also known as: Autologous Anti-CD83 CAR T Cells; Autologous Anti-CD83 CAR-T Cells
Undergo bone marrow aspiration blood sample collection
Also known as: Biological Sample Collection, Biospecimen Collected, Specimen Collection
Undergo chest x-ray
Also known as: Chest X-ray
Undergo CT
Also known as: CAT, CAT Scan, Computed Axial Tomography, Computerized Axial Tomography, Computerized axial tomography (procedure), Computerized Tomography, Computerized Tomography (CT) scan, CT, CT Scan, tomography
Given IV
Also known as: (-)-Cyclophosphamide, 2H-1,3,2-Oxazaphosphorine, 2-[bis(2-chloroethyl)amino]tetrahydro-, 2-oxide, monohydrate, Asta B 518, B 518, B-518, B518, Carloxan, Ciclofosfamida, Ciclofosfamide, Cicloxal, Clafen, Claphene, CP monohydrate, CTX, CYCLO-cell, Cycloblastin, Cycloblastine, Cyclophospham, Cyclophosphamid monohydrate, Cyclophosphamide Monohydrate, Cyclophosphamidum, Cyclophosphan, Cyclophosphane, Cyclophosphanum, Cyclostin, Cyclostine, Cytophosphan, Cytophosphane, Cytoxan, Fosfaseron, Genoxal, Genuxal, Ledoxina, Mitoxan, Neosar, Revimmune, Syklofosfamid, WR 138719, WR- 138719, WR-138719, WR138719
Undergo ECHO
Also known as: EC
Given IV
Also known as: 2-F-ara-AMP, 9H-Purin-6-amine, 2-fluoro-9-(5-O-phosphono-.beta.-D-arabinofuranosyl)-, Beneflur, Fludara, SH T 586
Given hydroxyurea
Also known as: Droxia, Hydrea, Hydroxycarbamide, Litalir, Onco-Carbide, Oncocarbide, Oxeron, SQ 1089, SQ-1089, Syrea, WR 83799
Undergo leukapheresis
Also known as: Leukocyte Adsorptive Apheresis, Leukocytopheresis, Therapeutic Leukopheresis, White Blood Cell Reduction Apheresis
Undergo lumbar puncture
Also known as: LP, Spinal Tap
Undergo PET
Also known as: Medical Imaging, Positron Emission Tomography, PET, PET Scan, Positron emission tomography (procedure), Positron Emission Tomography Scan, Positron-Emission Tomography, PT
Ancillary studies
Incidence of dose-limiting toxicity (DLT)
Will be defined as any adverse events based on Common Terminology Criteria for Adverse Events (CTCAE) version (v)5. Cytokine release syndrome(CRS)/immune effector cell-associated neurotoxicity syndrome will be graded according to American Society for Transplantation and Cellular Therapy (ASTCT) Consensus Guidelines. The DLTs will be summarized by dose level using frequencies and relative frequencies. Will employ the Bayesian optimal interval design to find the maximal tolerated dose (MTD). The target DLT rate for the MTD is = 0.33.
Time frame: Up to 28 days
Objective response
Will be determine as the number of patients achieving complete remission, partial remission, and/or morphologic leukemia free state by 2022 European Leukemia Net Response Criteria. Will be summarized by dose level using frequencies and relative frequencies. Rates will be estimated using 95% credible regions obtained by Jeffrey's prior method. As exploratory analyses, comparisons between dose levels may be made using Fisher's exact test.
Time frame: At 28 days and 1 year
Overall survival
Will be summarized by dose level using cumulative incidence or Kaplan-Meier curves, as appropriate. Estimates of the median times will be obtained with 95% confidence intervals calculated using the log-log transformation. As exploratory analyses, comparisons between dose levels may be made using Gray's or the log-rank test, as appropriate.
Time frame: From treatment initiation until death due to any cause or last follow-up, assessed up to 1 year
Progression-free survival
Will be summarized by dose level using cumulative incidence or Kaplan-Meier curves, as appropriate. Estimates of the median times will be obtained with 95% confidence intervals calculated using the log-log transformation. As exploratory analyses, comparisons between dose levels may be made using Gray's or the log-rank test, as appropriate.
Time frame: From treatment initiation until disease progression/relapse, death due to any cause, subsequent treatment (censored), or last follow-up, assessed up to 1 year
Hematologic recovery
Will be assessed by achieving an absolute neutrophil count recovery (\> 0.5 x 10\^9/L). Will be summarized by dose level using frequencies and relative frequencies. Rates will be estimated using 95% credible regions obtained by Jeffrey's prior method. As exploratory analyses, comparisons between dose levels may be made using Fisher's exact test.
Time frame: At 28 days
Time to hematologic recovery
Relapse or death will be considered the competing risk. Will be summarized by dose level using cumulative incidence or Kaplan-Meier curves, as appropriate. Estimates of the median times will be obtained with 95% confidence intervals calculated using the log-log transformation. As exploratory analyses, comparisons between dose levels may be made using Gray's or the log-rank test, as appropriate.
Time frame: From treatment initiation until hematologic recovery or last follow-up, assessed up to 1 year
Acute graft-versus-host disease (GVHD)
Will be defined as a grade II-IV acute GVHD. Will be summarized by dose level using cumulative incidence or Kaplan-Meier curves, as appropriate. Estimates of the median times will be obtained with 95% confidence intervals calculated using the log-log transformation. As exploratory analyses, comparisons between dose levels may be made using Gray's or the log-rank test, as appropriate.
Time frame: Up to 6 weeks
Time to GVHD
Relapse or death will be considered the competing risk. Will be summarized by dose level using cumulative incidence or Kaplan-Meier curves, as appropriate. Estimates of the median times will be obtained with 95% confidence intervals calculated using the log-log transformation. As exploratory analyses, comparisons between dose levels may be made using Gray's or the log-rank test, as appropriate.
Time frame: From treatment initiation until grade II-IV GVHD, 6 weeks post infusion, or last follow-up, assessed up to 1 year
Treatment-related adverse events
Will be defined as by CTCAE v5 and CRS by ASTCT Consensus Grading for CRS and Neurological Toxicity Associated with Immune Effector Cells. Will be summarized by dose level using frequencies and relative frequencies. Rates will be estimated using 95% credible regions obtained by Jeffrey's prior method. As exploratory analyses, comparisons between dose levels may be made using Fisher's exact test.
Time frame: Up to 12 months
Time to treatment related adverse event
Relapse or death will be considered the competing risk. Will be summarized by dose level using cumulative incidence or Kaplan-Meier curves, as appropriate. Estimates of the median times will be obtained with 95% confidence intervals calculated using the log-log transformation. As exploratory analyses, comparisons between dose levels may be made using Gray's or the log-rank test, as appropriate
Time frame: From treatment initiation until a treatment related adverse event, 12 months post infusion, or last follow-up, assessed up to 1 year
Number of peripheral blood chimeric antigen receptor (CAR) T cells
Will be summarized by dose level and timepoint (pre- and post-therapy) using the mean, median, and standard deviation; and graphically using dot plots. The log absolute number of CD83 CAR T cells per peripheral blood volume will be modeled as a function of dose level, time, their two-way interaction, and a random subject effect using a linear mixed model. Tests about the appropriate contrasts on model estimates will be sued to compare: 1) changes relative to pre-therapy within each dose level, and 2) changes at a given timepoint between dose levels. All model assumptions will be verified graphically, and transformations applied as appropriate.
Time frame: Up to 1 year
From the registry record's own update history. This site started tracking changes on Sep 25, 2026; for anything earlier, see the record history on ClinicalTrials.gov ↗
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Studies of the drugs tested here: Cyclophosphamide · Fludarabine phosphate · Hydroxyurea
Roswell Park Cancer Institute →