CClinicalTrials.gg
CompletedNCT02572791SHINEUpdated Feb 24, 2026Results posted

Staph Household Intervention for Eradication (SHINE)

A Phase 4 interventional study of Chlorhexidine and Mupirocin in Skin and Subcutaneous Tissue Bacterial Infections, Staphylococcus Aureus and MRSA - Methicillin Resistant Staphylococcus Aureus Infection, sponsored by Washington University School of Medicine. Completed at 2 sites in United States. Open to participants aged Up to 18 Years. Per ClinicalTrials.gov, last updated 2026-02-24.

Sponsored by Washington University School of Medicine · Phase 4, Interventional, and Treatment

Phase
Phase 4
Study type
Interventional
Enrollment
835
Allocation
Randomized
Ages
Up to 18 Years
Sex
All
01

Study summary

The investigators propose a pragmatic comparative effectiveness trial evaluating several decolonization strategies in patients with Staphylococcus aureus infection, their household contacts, and household environmental surfaces. The central hypothesis of this proposal is that an integrated approach of periodic personal and household environmental hygiene will reduce S. aureus transmission in households and subsequently decrease the incidence of skin and soft tissue infections (SSTI).

Read the detailed description

Patients with active or recent S. aureus SSTI will be recruited from St. Louis Children's Hospital and community pediatric practices affiliated with the investigators practice-based research network. All participants (index patients and their household contacts) will perform a baseline S. aureus decolonization protocol for 5 days consisting of enhanced hygiene measures, application of mupirocin antibiotic ointment to the anterior nares twice daily, and daily body washes with chlorhexidine antiseptic. Following the 5-day baseline decolonization regimen, households will be randomized to one of three intervention groups: 1) Periodic personal decolonization performed by all household members, to include chlorhexidine body washes twice weekly for 3 months and application of intranasal mupirocin for 5 consecutive days each month for 3 months; 2) Household environmental hygiene, including targeted cleaning of household surfaces and laundering of bed linens, weekly for 3 months; and 3) Integrated periodic personal decolonization and household environmental hygiene for 3 months. Households will be followed prospectively (1, 3, 6, and 9 months following randomization) to measure the prevalence of S. aureus colonization in the participants, household environmental surfaces, and pet dogs and cats and to document the incidence of recurrent SSTI. Molecular strain typing will be performed on all recovered S. aureus isolates to illuminate transmission dynamics and the effects of the decolonization measures on genetic epidemiology. Lastly, the investigators will assess resistance to the prescribed topical antimicrobials at baseline and longitudinal samplings.

02

Conditions studied

  • Skin and Subcutaneous Tissue Bacterial Infections
  • Staphylococcus Aureus
  • MRSA - Methicillin Resistant Staphylococcus Aureus Infection
03

In context

Staphylococcal Infections

273 studies on the registry are indexed under Staphylococcal Infections; 29 are open to participants now.

This study's enrollment of 835 is above the median of 120 across 177 interventional studies indexed under Staphylococcal Infections.

Browse Staphylococcal Infections studies →

Lead sponsor

Washington University School of Medicine is the lead sponsor of 1,765 studies on the registry; 271 are open to participants now.

Of its 324 completed or terminated interventional studies of FDA-regulated products, 212 (65%) have results posted.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
Up to 18 Years
Sexes eligible
All
Accepts healthy volunteers
No

Inclusion criteria

  • Patients 18 years of age and younger
  • Confirmed (i.e., culture-positive) active or recent (within the past 2 months) S. aureus cutaneous infections
  • Reside within 75 miles of St. Louis Children's Hospital
  • Provide written, informed consent, or consent is provided by a parent or legal guardian

Exclusion criteria

Exclusion Criteria:

  • Patients with nosocomial infections (i.e., >48 hours after hospitalization)
  • Patients with traditional risk factors for HA-MRSA (e.g., immunodeficiency, indwelling catheter or percutaneous medical device, undergoing dialysis, presenting with a surgical site infection, or residing in a long-term care facility within the past year).
  • Patients who are unable to give consent or for whom consent is not obtained
  • Patients refusing home environmental cultures by the study team
  • Patients without a permanent home (e.g., living in a shelter or group home)
05

Study design

Phase
Phase 4
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Parallel assignment
Masking
None (open label)
Enrollment
835 participants (actual)

Study arms

  • Experimental
    Periodic personal decolonization

    All household participants will perform chlorhexidine body washes twice weekly for 3 months and apply mupirocin ointment to the anterior nares twice daily for five consecutive days each month for 3 months.

    Drug: Chlorhexidine · Drug: Mupirocin

  • Experimental
    Household environmental hygiene

    In addition to their usual cleaning, households will be asked to perform targeted household hygiene focusing on sources known to harbor S. aureus and serve as reservoirs for transmission.

    Behavioral: Household cleaning

  • Experimental
    Integrated personal/household hygiene

    Participants in households randomized to this arm will perform the Periodic Personal Decolonization plus the Household Environmental Hygiene, described above in arms 1 and 2.

    Drug: Chlorhexidine · Drug: Mupirocin · Behavioral: Household cleaning

Interventions

  • DrugChlorhexidine

    Also known as: Hibiclens

  • DrugMupirocin

    Also known as: Bactroban

  • BehavioralHousehold cleaning
06

What researchers measure

Primary outcomes

  1. Number of Households With at Least One Skin and Soft Tissue Infection

    Number of households with at least one SSTI between the Integrated Decolonization Group and the combined Personal Periodic Decolonization and Environmental Decontamination Groups.

    Time frame: 3 months after randomization

Secondary outcomes

  1. Prevalence of MRSA Colonization in Participants

    Describe baseline prevalence of MRSA colonization in participants

    Time frame: Baseline sampling

  2. Prevalence of MRSA Colonization in Participants

    Describe longitudinal MRSA colonization prevalence in participants

    Time frame: 9 months

  3. Confirmed S. Aureus Infection

    We will compare the development of a confirmed S. aureus infection between participants in the 3 groups over 9 months at the household and individual level.

    Time frame: 9 months

  4. Incidence of SSTI

    We will compare the number of households in which at least one household member develops SSTI 1 month after randomization between the Integrated Decolonization Group and the combined Personal Periodic Decolonization and Environmental Decontamination Groups.

    Time frame: 1 month

  5. Incidence of SSTI

    We will compare the incidence of households in which at least one household member experiences an SSTI at the household level 6 months after randomization between the Integrated Decolonization Group and the combined Personal Periodic Decolonization and Environmental Decontamination Groups.

    Time frame: 6 months

  6. Incidence of SSTI

    We will compare the number of households in which at least one household member develops SSTI 9 months after randomization between the Integrated Decolonization Group and the combined Personal Periodic Decolonization and Environmental Decontamination Groups.

    Time frame: 9 months

  7. Mupirocin Resistance

    Measure the prevalence of mupirocin resistance in S. aureus strains recovered at serial samplings over the study period of 9 months.

    Time frame: 9 months

  8. Number of Patients With Adverse Events Due to Study Intervention

    We will describe the number of participants with adverse events due to study intervention (e.g., rhinorrhea, rash, dry skin) and compare between the three groups.

    Time frame: 3 months

  9. Number of Participants Adhering to Study Intervention Procedures

    We will describe the number of participants completing chlorhexidine baths, mupirocin applications, and household hygiene measures.

    Time frame: 3 months

  10. SSTI Incidence: Individual Level

    Individual Participant SSTI Incidence

    Time frame: 1 Month

  11. SSTI Incidence: Individual Level

    Individual Participant SSTI Incidence

    Time frame: 3 Months

  12. SSTI Incidence: Individual Level

    Individual Participant SSTI Incidence

    Time frame: 6 Months

  13. SSTI Incidence: Participants With SSTI in the Year Prior to Trial Enrollment

    Incidence of SSTI in Participants who Experienced an SSTI in the Year Prior to Enrollment. During the enrollment survey, all participants were asked if they had ever had an SSTI, and when the SSTI occurred. If a participant had experienced an SSTI before joining this study, and that SSTI occurred less than a year before their enrollment date, they were included in this subgroup.

    Time frame: 1 Month

  14. SSTI Incidence: Participants With SSTI in the Year Prior to Trial Enrollment

    Incidence of SSTI in Participants who Experienced an SSTI in the Year Prior to Enrollment. During the enrollment survey, all participants were asked if they had ever had an SSTI, and when the SSTI occurred. If a participant had experienced an SSTI before joining this study, and that SSTI occurred less than a year before their enrollment date, they were included in this subgroup.

    Time frame: 3 Months

  15. SSTI Incidence: Participants With SSTI in the Year Prior to Trial Enrollment

    Incidence of SSTI in Participants who Experienced an SSTI in the Year Prior to Enrollment. During the enrollment survey, all participants were asked if they had ever had an SSTI, and when the SSTI occurred. If a participant had experienced an SSTI before joining this study, and that SSTI occurred less than a year before their enrollment date, they were included in this subgroup.

    Time frame: 6 Months

  16. SSTI Incidence: Participants With SSTI in the Year Prior to Trial Enrollment

    Incidence of SSTI in Participants who Experienced an SSTI in the Year Prior to Enrollment. During the enrollment survey, all participants were asked if they had ever had an SSTI, and when the SSTI occurred. If a participant had experienced an SSTI before joining this study, and that SSTI occurred less than a year before their enrollment date, they were included in this subgroup.

    Time frame: 9 Months

  17. SSTI Incidence: Index Patients

    Cumulative Incidence of SSTI in Index Patients

    Time frame: 1 Month

  18. SSTI Incidence: Index Patients

    Cumulative Incidence of SSTI in Index Patients

    Time frame: 3 Months

  19. SSTI Incidence: Index Patients

    Cumulative Incidence of SSTI in Index Patients

    Time frame: 6 Months

  20. SSTI Incidence: Index Patients

    Cumulative Incidence of SSTI in Index Patients

    Time frame: 9 Months

07

Results

Posted Feb 24, 2026
Limitations and caveats
Due to the COVID-19 pandemic, we stopped early at 196, rather than 207 households.

Participant flow

From 2015-2021, pediatric patients with culture-confirmed, community-onset S. aureus SSTIs ("index patients") were recruited from St. Louis Children's Hospital (SLCH) and community pediatric practices in metropolitan St. Louis. Children with nosocomial infections, healthcare-related risk factors, or immunodeficiency were excluded. Household contacts (individuals sleeping in the home ≥4 nights per week) were also enrolled. All study visits were conducted in participants' homes.

Intervention Period: Months 0-3
Participant flow — Intervention Period: Months 0-3
MilestonePeriodic Personal DecolonizationHousehold Environmental HygieneIntegrated Personal/Household Hygiene
Started273270290
Completed228235255
Not completed453535
Withdrew: Lost to follow-up351532
Withdrew: Withdrawal by subject881
Withdrew: Moved out of household2122
Post-Intervention Period: Months 4-9
Participant flow — Post-Intervention Period: Months 4-9
MilestonePeriodic Personal DecolonizationHousehold Environmental HygieneIntegrated Personal/Household Hygiene
Started229235256
Completed213222242
Not completed161314
Withdrew: Lost to follow-up10813
Withdrew: Withdrawal by subject011
Withdrew: Moved out of household640

Outcome measures

PrimaryNumber of Households With at Least One Skin and Soft Tissue Infection

Number of households with at least one SSTI between the Integrated Decolonization Group and the combined Personal Periodic Decolonization and Environmental Decontamination Groups.

Time frame:
3 months after randomization
Reported as:
Count of units · Households
Number of Households With at Least One Skin and Soft Tissue Infection
HouseholdsPeriodic Personal DecolonizationIntegrated Personal/Household HygieneHousehold Environmental Hygiene
Number of Households With at Least One Skin and Soft Tissue Infection212122
SecondaryPrevalence of MRSA Colonization in Participants

Describe baseline prevalence of MRSA colonization in participants

Time frame:
Baseline sampling
Reported as:
Count of participants · Participants
Prevalence of MRSA Colonization in Participants
ParticipantsPeriodic Personal DecolonizationIntegrated Personal/Household HygieneHousehold Environmental Hygiene
Prevalence of MRSA Colonization in Participants396160
SecondaryPrevalence of MRSA Colonization in Participants

Describe longitudinal MRSA colonization prevalence in participants

Time frame:
9 months
Reported as:
Count of participants · Participants
Prevalence of MRSA Colonization in Participants
ParticipantsPeriodic Personal DecolonizationIntegrated Personal/Household HygieneHousehold Environmental Hygiene
Prevalence of MRSA Colonization in Participants122224
SecondaryConfirmed S. Aureus Infection

We will compare the development of a confirmed S. aureus infection between participants in the 3 groups over 9 months at the household and individual level.

Time frame:
9 months
Reported as:
Count of participants · Participants
Confirmed S. Aureus Infection
ParticipantsPeriodic Personal DecolonizationIntegrated Personal/Household HygieneHousehold Environmental Hygiene
Confirmed S. Aureus Infection8471135
SecondaryIncidence of SSTI

We will compare the number of households in which at least one household member develops SSTI 1 month after randomization between the Integrated Decolonization Group and the combined Personal Periodic Decolonization and Environmental Decontamination Groups.

Time frame:
1 month
Reported as:
Count of units · Households
Incidence of SSTI
HouseholdsPeriodic Personal DecolonizationIntegrated Personal/Household HygieneHousehold Environmental Hygiene
Incidence of SSTI141316
SecondaryIncidence of SSTI

We will compare the incidence of households in which at least one household member experiences an SSTI at the household level 6 months after randomization between the Integrated Decolonization Group and the combined Personal Periodic Decolonization and Environmental Decontamination Groups.

Time frame:
6 months
Reported as:
Count of units · Households
Incidence of SSTI
HouseholdsPeriodic Personal DecolonizationIntegrated Personal/Household HygieneHousehold Environmental Hygiene
Incidence of SSTI282732
SecondaryIncidence of SSTI

We will compare the number of households in which at least one household member develops SSTI 9 months after randomization between the Integrated Decolonization Group and the combined Personal Periodic Decolonization and Environmental Decontamination Groups.

Time frame:
9 months
Reported as:
Count of units · Households
Incidence of SSTI
HouseholdsPeriodic Personal DecolonizationIntegrated Personal/Household HygieneHousehold Environmental Hygiene
Incidence of SSTI303238
SecondaryMupirocin Resistance

Measure the prevalence of mupirocin resistance in S. aureus strains recovered at serial samplings over the study period of 9 months.

Time frame:
9 months
Reported as:
Count of participants · Participants
Mupirocin Resistance
ParticipantsPeriodic Personal DecolonizationIntegrated Personal/Household HygieneHousehold Environmental Hygiene
Mupirocin Resistance612
SecondaryNumber of Patients With Adverse Events Due to Study Intervention

We will describe the number of participants with adverse events due to study intervention (e.g., rhinorrhea, rash, dry skin) and compare between the three groups.

Time frame:
3 months
Reported as:
Count of participants · Participants
Number of Patients With Adverse Events Due to Study Intervention
ParticipantsPeriodic Personal DecolonizationHousehold Environmental HygieneIntegrated Personal/Household Hygiene
Number of Patients With Adverse Events Due to Study Intervention11192137
SecondaryNumber of Participants Adhering to Study Intervention Procedures

We will describe the number of participants completing chlorhexidine baths, mupirocin applications, and household hygiene measures.

Time frame:
3 months
Reported as:
Count of participants · Participants
Number of Participants Adhering to Study Intervention Procedures
ParticipantsPeriodic Personal DecolonizationIntegrated Personal/Household HygieneHousehold Environmental Hygiene
Number of Participants Adhering to Study Intervention Procedures1124555
SecondarySSTI Incidence: Individual Level

Individual Participant SSTI Incidence

Time frame:
1 Month
Reported as:
Count of participants · Participants
SSTI Incidence: Individual Level
ParticipantsPeriodic Personal DecolonizationIntegrated Personal/Household HygieneHousehold Environmental Hygiene
SSTI Incidence: Individual Level181619
SecondarySSTI Incidence: Individual Level

Individual Participant SSTI Incidence

Time frame:
3 Months
Reported as:
Count of participants · Participants
SSTI Incidence: Individual Level
ParticipantsPeriodic Personal DecolonizationIntegrated Personal/Household HygieneHousehold Environmental Hygiene
SSTI Incidence: Individual Level292429
SecondarySSTI Incidence: Individual Level

Individual Participant SSTI Incidence

Time frame:
6 Months
Reported as:
Count of participants · Participants
SSTI Incidence: Individual Level
ParticipantsPeriodic Personal DecolonizationIntegrated Personal/Household HygieneHousehold Environmental Hygiene
SSTI Incidence: Individual Level393143
SecondarySSTI Incidence: Participants With SSTI in the Year Prior to Trial Enrollment

Incidence of SSTI in Participants who Experienced an SSTI in the Year Prior to Enrollment. During the enrollment survey, all participants were asked if they had ever had an SSTI, and when the SSTI occurred. If a participant had experienced an SSTI before joining this study, and that SSTI occurred less than a year before their enrollment date, they were included in this subgroup.

Time frame:
1 Month
Reported as:
Count of participants · Participants
SSTI Incidence: Participants With SSTI in the Year Prior to Trial Enrollment
ParticipantsPeriodic Personal DecolonizationHousehold Environmental HygieneIntegrated Personal/Household Hygiene
SSTI Incidence: Participants With SSTI in the Year Prior to Trial Enrollment171310
SecondarySSTI Incidence: Participants With SSTI in the Year Prior to Trial Enrollment

Incidence of SSTI in Participants who Experienced an SSTI in the Year Prior to Enrollment. During the enrollment survey, all participants were asked if they had ever had an SSTI, and when the SSTI occurred. If a participant had experienced an SSTI before joining this study, and that SSTI occurred less than a year before their enrollment date, they were included in this subgroup.

Time frame:
3 Months
Reported as:
Count of participants · Participants
SSTI Incidence: Participants With SSTI in the Year Prior to Trial Enrollment
ParticipantsPeriodic Personal DecolonizationHousehold Environmental HygieneIntegrated Personal/Household Hygiene
SSTI Incidence: Participants With SSTI in the Year Prior to Trial Enrollment252218
SecondarySSTI Incidence: Participants With SSTI in the Year Prior to Trial Enrollment

Incidence of SSTI in Participants who Experienced an SSTI in the Year Prior to Enrollment. During the enrollment survey, all participants were asked if they had ever had an SSTI, and when the SSTI occurred. If a participant had experienced an SSTI before joining this study, and that SSTI occurred less than a year before their enrollment date, they were included in this subgroup.

Time frame:
6 Months
Reported as:
Count of participants · Participants
SSTI Incidence: Participants With SSTI in the Year Prior to Trial Enrollment
ParticipantsPeriodic Personal DecolonizationHousehold Environmental HygieneIntegrated Personal/Household Hygiene
SSTI Incidence: Participants With SSTI in the Year Prior to Trial Enrollment323320
SecondarySSTI Incidence: Participants With SSTI in the Year Prior to Trial Enrollment

Incidence of SSTI in Participants who Experienced an SSTI in the Year Prior to Enrollment. During the enrollment survey, all participants were asked if they had ever had an SSTI, and when the SSTI occurred. If a participant had experienced an SSTI before joining this study, and that SSTI occurred less than a year before their enrollment date, they were included in this subgroup.

Time frame:
9 Months
Reported as:
Count of participants · Participants
SSTI Incidence: Participants With SSTI in the Year Prior to Trial Enrollment
ParticipantsPeriodic Personal DecolonizationHousehold Environmental HygieneIntegrated Personal/Household Hygiene
SSTI Incidence: Participants With SSTI in the Year Prior to Trial Enrollment364025
SecondarySSTI Incidence: Index Patients

Cumulative Incidence of SSTI in Index Patients

Time frame:
1 Month
Reported as:
Count of participants · Participants
SSTI Incidence: Index Patients
ParticipantsPeriodic Personal DecolonizationHousehold Environmental HygieneIntegrated Personal/Household Hygiene
SSTI Incidence: Index Patients8117
SecondarySSTI Incidence: Index Patients

Cumulative Incidence of SSTI in Index Patients

Time frame:
3 Months
Reported as:
Count of participants · Participants
SSTI Incidence: Index Patients
ParticipantsPeriodic Personal DecolonizationHousehold Environmental HygieneIntegrated Personal/Household Hygiene
SSTI Incidence: Index Patients151612
SecondarySSTI Incidence: Index Patients

Cumulative Incidence of SSTI in Index Patients

Time frame:
6 Months
Reported as:
Count of participants · Participants
SSTI Incidence: Index Patients
ParticipantsPeriodic Personal DecolonizationHousehold Environmental HygieneIntegrated Personal/Household Hygiene
SSTI Incidence: Index Patients212313
SecondarySSTI Incidence: Index Patients

Cumulative Incidence of SSTI in Index Patients

Time frame:
9 Months
Reported as:
Count of participants · Participants
SSTI Incidence: Index Patients
ParticipantsPeriodic Personal DecolonizationHousehold Environmental HygieneIntegrated Personal/Household Hygiene
SSTI Incidence: Index Patients232716

Adverse events

Collected over Adverse events were recorded during the baseline and 3 month intervention period (3.5 months).. Non-serious events are listed at a 0% frequency threshold.

Adverse event summary by group
GroupDeathsSeriousOther
Periodic Personal Decolonization0/274 (0%)0/274 (0%)111/274 (40.5%)
Household Environmental Hygiene0/269 (0%)0/269 (0%)93/269 (34.6%)
Integrated Personal/Household Hygiene0/292 (0%)0/292 (0%)137/292 (46.9%)
Most frequent other events
Most frequent other events
EventPeriodic Personal DecolonizationHousehold Environmental HygieneIntegrated Personal/Household Hygiene
Adverse Event from Chlorhexidine applicationSkin and subcutaneous tissue disorders61/27462/269101/292
Adverse Event from Mupirocin applicationSkin and subcutaneous tissue disorders74/27464/26988/292

Baseline characteristics

819 participants from 196 households were enrolled at the baseline study visit. And additional 16 participants subsequently joined the households during the 9-month longitudinal study and were enrolled; their information is captured in the demographic information provided.

Age, Continuous
Age, Continuous(Years)Periodic Personal DecolonizationHousehold Environmental HygieneIntegrated Personal/Household HygieneTotal
Median15 (0.04 to 59)17 (0.01 to 61)13 (0.02 to 75)15 (0.01 to 75)
Sex: Female, Male
Sex: Female, Male(Participants)Periodic Personal DecolonizationHousehold Environmental HygieneIntegrated Personal/Household HygieneTotal
Female159145165469
Male115125126366
Ethnicity (NIH/OMB)
Ethnicity (NIH/OMB)(Participants)Periodic Personal DecolonizationHousehold Environmental HygieneIntegrated Personal/Household HygieneTotal
Hispanic or Latino66517
Not Hispanic or Latino268264286818
Unknown or Not Reported0000
Race (NIH/OMB)
Race (NIH/OMB)(Participants)Periodic Personal DecolonizationHousehold Environmental HygieneIntegrated Personal/Household HygieneTotal
American Indian or Alaska Native0000
Asian55717
Native Hawaiian or Other Pacific Islander0000
Black or African American568395234
White195163175533
More than one race18191451
Unknown or Not Reported0000
Region of Enrollment
Region of Enrollment(participants)Periodic Personal DecolonizationHousehold Environmental HygieneIntegrated Personal/Household HygieneTotal
United States274270291835
Skin Infection in the Year Prior to Study Enrollment
Skin Infection in the Year Prior to Study Enrollment(number of participants w/skin infections)Periodic Personal DecolonizationHousehold Environmental HygieneIntegrated Personal/Household HygieneTotal
Number858064229
08

Study locations

2 sites
  • St. Louis Children's Hospital
    St Louis, Missouri 63110, United States
  • Washington University School of Medicine
    St Louis, Missouri 63110, United States
09

References and documents

Study documents

  • Protocol and statistical analysis plan · Mar 10, 2025

Documents are hosted by the registry — open the source record to download them.

10

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Feb 24, 2026, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
11

Registry details

Key details

Study ID
NCT02572791
Lead sponsor
Washington University School of Medicine
Responsible party
Stephanie A. Fritz (Professor of Pediatrics, Washington University School of Medicine) — Principal investigator
First posted
Oct 9, 2015
Start date
Oct 2015
Primary completion
Nov 2024
Completion
Dec 2024
Results posted
Feb 24, 2026
Last update
Feb 24, 2026

Study contacts

Stephanie A Fritz, MD, MSCI
principal investigator · Washington University School of Medicine

Oversight

Data monitoring committee
Yes
View the source record on ClinicalTrials.gov ↗

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This study is completed, as verified in Feb 2026. You cannot join it, but the record below documents what was studied.

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