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Msosa TC, Swai I, Aarnoutse R, Rinke de Wit TF, Ngowi K, Msefula C, Nliwasa M, Boer MSD. The Effect of Real-Time Medication Monitoring-Based Digital Adherence Tools on Adherence to Antiretroviral Therapy and Viral Suppression in People Living With HIV: A Systematic Literature Review and Meta-Analysis. J Acquir Immune Defic Syndr 2024; 96:411-420. [PMID: 38985562 PMCID: PMC11236270 DOI: 10.1097/qai.0000000000003449] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2023] [Accepted: 04/19/2024] [Indexed: 07/12/2024]
Abstract
BACKGROUND Universal antiretroviral therapy (ART) has led to improved treatment outcomes in persons living with HIV. Adherence to ART is required to achieve viral suppression. Real-time medication monitoring (RTMM)-based digital adherence tools (DATs) could be effective in improving ART adherence and viral suppression in persons living with HIV. OBJECTIVES The primary and secondary objectives of this review were to assess the effect of RTMM-based DATs on improving ART adherence and viral load suppression. METHODS We searched MEDLINE, Embase, and Global Health for publications published through October 11, 2022. Narrative synthesis and random effects meta-analyses were conducted to synthesize the results. RESULTS Of 638 papers identified, 8 were included. Six studies were randomized controlled trials (RCTs), and 2 were cohort studies. Two studies, an RCT in China (mean adherence: 96.2% vs 89.1%) and a crossover cohort study in Uganda (mean adherence: 84% vs 93%), demonstrated improved ART adherence. No studies demonstrated improved viral suppression. In the meta-analyses, we estimated that RTMM-based digital adherence tools had a statistically insignificant small positive effect on ART adherence and viral suppression with a standardized mean difference of 0.1922 [95% CI: -0.0268 to 0.4112, P-value: 0.0854] and viral suppression with an odds ratio of 1.3148 [95% CI: 0.9199 to 1.8791, P-value: 0.1331]. CONCLUSIONS Our meta-analyses found that RTMM-based DATs did not have a significant effect on ART adherence and viral suppression. However, due to few published studies available, heterogeneity of target populations, intervention designs, and adherence measurement instruments, more data are required to provide conclusive evidence.
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Affiliation(s)
- Takondwa Charles Msosa
- Department of Global Health, Amsterdam UMC, location University of Amsterdam, Amsterdam, the Netherlands
- Amsterdam Institute for Global Health and Development, Amsterdam, the Netherlands
- Helse Nord Tuberculosis Initiative, Kamuzu University of Health Sciences, Blantyre, Malawi
| | - Iraseni Swai
- Department of Global Health, Amsterdam UMC, location University of Amsterdam, Amsterdam, the Netherlands
- Kilimanjaro Clinical Research Institute, Moshi, Tanzania
| | - Rob Aarnoutse
- Radboud University Medical Center, Department of Pharmacy, Research Institute for Medical Innovation, Nijmegen, the Netherlands; and
| | - Tobias F. Rinke de Wit
- Department of Global Health, Amsterdam UMC, location University of Amsterdam, Amsterdam, the Netherlands
| | - Kennedy Ngowi
- Kilimanjaro Clinical Research Institute, Moshi, Tanzania
| | - Chisomo Msefula
- Helse Nord Tuberculosis Initiative, Kamuzu University of Health Sciences, Blantyre, Malawi
| | - Marriott Nliwasa
- Helse Nord Tuberculosis Initiative, Kamuzu University of Health Sciences, Blantyre, Malawi
| | - Marion Sumari-de Boer
- Amsterdam Institute for Global Health and Development, Amsterdam, the Netherlands
- Kilimanjaro Clinical Research Institute, Moshi, Tanzania
- Institute of Public Health, Kilimanjaro Christian Medical University College, Moshi, Tanzania
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Yuan GF, Qiao S, Li X, Shen Z, Zhou Y. How Does Anticipated HIV Stigma Affect Medication Adherence? A Longitudinal Path Analysis Model. AIDS Behav 2024; 28:1684-1693. [PMID: 38340222 DOI: 10.1007/s10461-024-04293-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/05/2024] [Indexed: 02/12/2024]
Abstract
Prior research has documented that anticipated HIV stigma may play an important predictive role in medication adherence among people living with HIV (PLWH). However, longitudinal data on the mechanisms underlying this linkage are scarce. The current study aimed to explore the longitudinal mediation association among anticipated HIV stigma, medication adherence support, HIV self-management, and medication adherence. A four-wave sample consisting of 1,098 Chinese PLWH (Mage = 38.63, SD = 9.20; 63.9% male) with a six-month interval was used in the current study. Participants were asked to complete self-report questionnaires. A path analysis model was analyzed. Results indicate that anticipated HIV stigma at baseline was positively related to medication adherence at Time 4 (T4). Medication adherence support at Time 2 (T2) and HIV self-management at Time 3 (T3) serially mediated the anticipated HIV stigma at Time 1 (T1) and medication adherence at T4. These findings provide critical insights into the mediating roles of medication adherence support and HIV self-management in the relationship between anticipated HIV stigma and medication adherence over time. Such an understanding has important implications for the development of tailored interventions and public health strategies aimed at improving medication adherence among PLWH in the context of HIV-related stigma.
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Affiliation(s)
- Guangzhe Frank Yuan
- School of Education Science, Leshan Normal University, Leshan, Sichuan, China.
- Department of Health Promotion Education and Behavior, Arnold School of Public Health, University of South Carolina, Columbia, SC, USA.
| | - Shan Qiao
- Department of Health Promotion Education and Behavior, Arnold School of Public Health, University of South Carolina, Columbia, SC, USA
- South Carolina SmartState Center for Healthcare Quality, Arnold School of Public Health, University of South Carolina, Columbia, SC, USA
| | - Xiaoming Li
- Department of Health Promotion Education and Behavior, Arnold School of Public Health, University of South Carolina, Columbia, SC, USA
- South Carolina SmartState Center for Healthcare Quality, Arnold School of Public Health, University of South Carolina, Columbia, SC, USA
| | - Zhiyong Shen
- Guangxi Center for Disease Control and Prevention, Nanning, Guangxi, China
| | - Yuejiao Zhou
- Guangxi Center for Disease Control and Prevention, Nanning, Guangxi, China
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Lattanzi FP, Fragoso da Silveira Gouvêa MI, Benamor Teixeira MDL, Fuller T, Macêdo Pinheiro Sodré MC, Ferreira Medeiros A, Bressan CDS, de Matos Salgueiro M, Braga CM, Gouvêa M, Amorim da Silva P, Mendes-Silva W, Souza EC, Santini de Oliveira M, Ceci L, João EC. Antiretroviral adherence among people living with HIV during the postpartum period: a retrospective cohort study at a PMTCT reference center in Rio de Janeiro before and during the COVID-19 pandemic. AIDS Care 2024:1-11. [PMID: 38648527 DOI: 10.1080/09540121.2024.2343590] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2023] [Accepted: 02/28/2024] [Indexed: 04/25/2024]
Abstract
Despite success in achieving viral suppression during pregnancy in people living with HIV (PLWH), postpartum adherence remains a challenge. We aimed to describe rates of adherence at a Prevention of Mother-to-Child HIV Transmission (PMTCT) Center before and during the COVID-19 pandemic. This study was conducted from a cohort of PLWH who received prenatal care and were virally suppressed near delivery. We tracked combined antiretroviral therapy (cART) pickups for 12 months and HIV viral load (VL) from 2 to 12 months after delivery. We defined flexible adherence as a monthly pickup of cART and strict adherence as also having VL < 200 copies/mL and at least one maternal HIV VL between two and twelve months postpartum. Pre-pandemic was defined as delivery from March 2017-February 2019 and pandemic as March 2020-February 2022. During the study, 1119 PLWH were followed, and 965 (86%) were suppressed near delivery. There were 511 pre-pandemic and 290 pandemic participants. Adherence rates were 66/511 (13%) and 38/290 (13%), respectively. During the pandemic, more participants conceived using cART and were undetectable at the start of prenatal care; nevertheless, postpartum adherence was no better than pre-pandemic underscoring the need to improve strategies for adherence specific to this subset of PLWH in the postpartum period.
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Affiliation(s)
| | - Maria Isabel Fragoso da Silveira Gouvêa
- Infectious Diseases Department, Hospital Federal dos Servidores do Estado, Rio de Janeiro, Brazil
- Evandro Chagas National Institute of Infectious Diseases, Oswaldo Cruz Foundation, Rio de Janeiro, Brazil
| | - Maria de Lourdes Benamor Teixeira
- Infectious Diseases Department, Hospital Federal dos Servidores do Estado, Rio de Janeiro, Brazil
- Evandro Chagas National Institute of Infectious Diseases, Oswaldo Cruz Foundation, Rio de Janeiro, Brazil
| | - Trevon Fuller
- Infectious Diseases Department, Hospital Federal dos Servidores do Estado, Rio de Janeiro, Brazil
| | | | | | | | | | - Camile Medeiros Braga
- Infectious Diseases Department, Hospital Federal dos Servidores do Estado, Rio de Janeiro, Brazil
| | - Marcelo Gouvêa
- Infectious Diseases Department, Hospital Federal dos Servidores do Estado, Rio de Janeiro, Brazil
| | - Patrícia Amorim da Silva
- Department of Maternal-Fetal Medicine, Hospital Federal dos Servidores do Estado, Rio de Janeiro, Brazil
| | - Wallace Mendes-Silva
- Department of Maternal-Fetal Medicine, Hospital Federal dos Servidores do Estado, Rio de Janeiro, Brazil
| | - Elaine Cristina Souza
- Infectious Diseases Department, Hospital Federal dos Servidores do Estado, Rio de Janeiro, Brazil
| | | | - Loredana Ceci
- Infectious Diseases Department, Hospital Federal dos Servidores do Estado, Rio de Janeiro, Brazil
| | - E C João
- Infectious Diseases Department, Hospital Federal dos Servidores do Estado, Rio de Janeiro, Brazil
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Muriithi FG, Banke-Thomas A, Forbes G, Gakuo RW, Thomas E, Gallos ID, Devall A, Coomarasamy A, Lorencatto F. A systematic review of behaviour change interventions to improve maternal health outcomes in sub-Saharan Africa. PLOS GLOBAL PUBLIC HEALTH 2024; 4:e0002950. [PMID: 38377077 PMCID: PMC10878526 DOI: 10.1371/journal.pgph.0002950] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/10/2023] [Accepted: 01/29/2024] [Indexed: 02/22/2024]
Abstract
The rate of decline in the global burden of avoidable maternal deaths has stagnated and remains an issue of concern in many sub-Saharan Africa countries. As per the most recent evidence, an average maternal mortality ratio (MMR) of 223 deaths per 100,000 live births has been estimated globally, with sub-Saharan Africa's average MMR at 536 per 100,000 live births-more than twice the global average. Despite the high MMR, there is variation in MMR between and within sub-Saharan Africa countries. Differences in the behaviour of those accessing and/or delivering maternal healthcare may explain variations in outcomes and provide a basis for quality improvement in health systems. There is a gap in describing the landscape of interventions aimed at modifying the behaviours of those accessing and delivering maternal healthcare for improving maternal health outcomes in sub-Saharan Africa. Our objective was to extract and synthesise the target behaviours, component behaviour change strategies and outcomes of behaviour change interventions for improving maternal health outcomes in sub-Saharan Africa. We followed the Preferred Reporting Items for Systematic Reviews and Meta-Analysis (PRISMA) guidelines. Our protocol was published a priori on PROSPERO (registration number CRD42022315130). We searched ten electronic databases (PsycINFO, Cochrane Database of Systematic Reviews, International Bibliography of Social Sciences, EMBASE, MEDLINE, Scopus, CINAHL PLUS, African Index Medicus, African Journals Online, and Web of Science) and included randomised trials and quasi-experimental studies. We extracted target behaviours and specified the behavioural interventions using the Action, Actor, Context, Time, and Target (AACTT) framework. We categorised the behaviour change strategies using the intervention functions described in the Behaviour Change Wheel (BCW). We reviewed 52 articles (26 randomized trials and 26 quasi-experimental studies). They had a mixed risk of bias. Out of these, 41 studies (78.8%) targeted behaviour change of those accessing maternal healthcare services, while seven studies (13.5%) focused on those delivering maternal healthcare. Four studies (7.7%) targeted mixed stakeholder groups. The studies employed a range of behaviour change strategies, including education 37 (33.3%), persuasion 20 (18%), training 19 (17.1%), enablement 16 (14.4%), environmental restructuring 8 (7.2%), modelling 6 (5.4%) and incentivisation 5 (4.5%). No studies used restriction or coercion strategies. Education was the most common strategy for changing the behaviour of those accessing maternal healthcare, while training was the most common strategy in studies targeting the behaviour of those delivering maternal healthcare. Of the 52 studies, 40 reported effective interventions, 7 were ineffective, and 5 were equivocal. A meta-analysis was not feasible due to methodological and clinical heterogeneity across the studies. In conclusion, there is evidence of effective behaviour change interventions targeted at those accessing and/or delivering maternal healthcare in sub-Saharan Africa. However, more focus should be placed on behaviour change by those delivering maternal healthcare within the health facilities to fast-track the reduction of the huge burden of avoidable maternal deaths in sub-Saharan Africa.
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Affiliation(s)
- Francis G. Muriithi
- WHO Collaborating Centre for Global Women’s Health, Institute of Metabolism and Systems Research, University of Birmingham, Edgbaston, Birmingham, United Kingdom
| | - Aduragbemi Banke-Thomas
- Department of Infectious Disease Epidemiology, London School of Hygiene and Tropical Medicine, London, United Kingdom
- School of Human Sciences, University of Greenwich, Old Royal Naval College, Park Row, Greenwich, London, United Kingdom
| | - Gillian Forbes
- Centre for Behaviour Change, University College London, London, United Kingdom
| | - Ruth W. Gakuo
- Department of Nursing, Queen’s Medical Centre, Nottingham University Hospitals NHS Trust, Lenton, Nottingham, United Kingdom
| | - Eleanor Thomas
- WHO Collaborating Centre for Global Women’s Health, Institute of Metabolism and Systems Research, University of Birmingham, Edgbaston, Birmingham, United Kingdom
| | - Ioannis D. Gallos
- WHO Collaborating Centre for Global Women’s Health, Institute of Metabolism and Systems Research, University of Birmingham, Edgbaston, Birmingham, United Kingdom
- UNDP/UNFPA/UNICEF/WHO/World Bank Special Programme of Research, Development and Research Training in Human Reproduction (HRP), Department of Sexual and Reproductive Health and Research, World Health Organization, Geneva, Switzerland
| | - Adam Devall
- WHO Collaborating Centre for Global Women’s Health, Institute of Metabolism and Systems Research, University of Birmingham, Edgbaston, Birmingham, United Kingdom
| | - Arri Coomarasamy
- WHO Collaborating Centre for Global Women’s Health, Institute of Metabolism and Systems Research, University of Birmingham, Edgbaston, Birmingham, United Kingdom
| | - Fabiana Lorencatto
- Centre for Behaviour Change, University College London, London, United Kingdom
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Msosa TC, Swai I, Sumari-de Boer M, Ngowi K, F Rinke de Wit T, Aarnoutse R, Nliwasa M. The effect of a customised digital adherence tool on HIV treatment outcomes in young people living with HIV (YPLHIV) in Blantyre, Malawi: a protocol for a randomised controlled trial. Trials 2023; 24:535. [PMID: 37582823 PMCID: PMC10428554 DOI: 10.1186/s13063-023-07496-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2023] [Accepted: 07/05/2023] [Indexed: 08/17/2023] Open
Abstract
BACKGROUND People living with HIV (PLHIV) have to take lifelong antiretroviral treatment, which is often challenging. Young people living with HIV (YPLHIV) have the lowest viral load suppression rates in Malawi and globally, mostly due to poor treatment adherence. This is a result of complex interactions of multiple factors unique to this demographic group. The use of digital health interventions, such as real-time medication monitor (RTMM)-based digital adherence tools (DATs), could improve ART adherence in YPLHIV and subsequently improve viral load suppression which in turn could lead to reduced HIV-associated morbidity and mortality. AIM To provide the evidence base for a digital adherence intervention to improve treatment outcomes in YPLHIV on ART. OBJECTIVES 1. The primary objective is to determine the efficacy of a customised DAT compared to the standard of care in improving ART adherence in YPLHIV. 2. The secondary objective is to determine the efficacy of the customised DAT compared to the standard of care in improving viral load suppression in YPLHIV. METHODOLOGY This will be a parallel open-label randomised control controlled two-arm trial in which non-adherent YPLHIV in selected ART facilities in Blantyre will be randomised in a 1:1 ratio to a customised DAT and standard care arms and followed up for 9 months. The primary outcome is the proportion adherent at 9 months (> = 95% by pill count), and the secondary outcome is the proportion with viral load suppressed at 9 months (< 200 copies/ml). DISCUSSION There is a paucity of good quality evidence on effective digital health interventions to improve ART adherence and viral load suppression in YPLHIV globally and particularly in HIV high-burden settings like Malawi. This study will provide good-quality evidence on the effectiveness of a customised DAT in improving ART adherence and viral load suppression in this important demographic. TRIAL REGISTRATION The trial has been registered in the Pan African Clinical Trials Registry number: PACTR202303867267716 on 23 March 2023 and can be accessed through the following URL: https://pactr.samrc.ac.za/TrialDisplay.aspx?TrialID=25424 . All items from the WHO Trial Registration Data Set are described in this manuscript.
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Affiliation(s)
- Takondwa Charles Msosa
- Helse Nord Tuberculosis Initiative, Department of Pathology, Kamuzu University of Health Sciences, Blantyre, Malawi.
- Department of Global Health, Amsterdam UMC, Location University of Amsterdam, Amsterdam Institute for Global Health and Development, Meibergdreef 9, Amsterdam, the Netherlands.
| | - Iraseni Swai
- Department of Global Health, Amsterdam UMC, Location University of Amsterdam, Amsterdam Institute for Global Health and Development, Meibergdreef 9, Amsterdam, the Netherlands
- Kilimanjaro Clinical Research Institute, Moshi, Tanzania
| | - Marion Sumari-de Boer
- Kilimanjaro Clinical Research Institute, Moshi, Tanzania
- Institute of Public Health, Kilimanjaro Christian Medical University College, Moshi, Tanzania
- Knowledge, Innovation and Technology Group, Wageningen University & Research, Droevendaalsesteeg, the Netherlands
- Amsterdam Institute of Global Health and Development, Amsterdam, the Netherlands
| | - Kennedy Ngowi
- Department of Global Health, Amsterdam UMC, Location University of Amsterdam, Amsterdam Institute for Global Health and Development, Meibergdreef 9, Amsterdam, the Netherlands
- Kilimanjaro Clinical Research Institute, Moshi, Tanzania
| | - Tobias F Rinke de Wit
- Amsterdam Institute of Global Health and Development, Amsterdam, the Netherlands
- PharmAccess Foundation, Amsterdam, the Netherlands
| | - Rob Aarnoutse
- Department of Pharmacy, Radboud University Medical Center, Research Institute for Medical Innovation, Nijmegen, the Netherlands
| | - Marriott Nliwasa
- Helse Nord Tuberculosis Initiative, Department of Pathology, Kamuzu University of Health Sciences, Blantyre, Malawi
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Larson BA, Tsikhutsu I, Bii M, Halim N, Agaba P, Sugut W, Muli J, Sawe F. The effects of revised peer-counselor support on the PMTCT cascade of care: results from a cluster-randomized trial in Kenya (the EMMA study). BMC Infect Dis 2023; 23:257. [PMID: 37098468 PMCID: PMC10127503 DOI: 10.1186/s12879-023-08246-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2023] [Accepted: 04/12/2023] [Indexed: 04/27/2023] Open
Abstract
BACKGROUND This study evaluated the effect of revisions to existing peer-counselor services, called Mentor Mothers (MM), at maternal and child health clinics on medication adherence for women living with HIV (WLWH) in Kenya and on early infant HIV testing. METHODS The Enhanced Mentor Mother Program study was a 12-site, two-arm cluster-randomized trial enrolling pregnant WLWH from March 2017 to June 2018 (with data collection through September 2020). Six clinics were randomized to continued MM-supported standard care (SC). Six clinics were randomized to the intervention arm (INT = SC plus revised MM services to include more one-on-one interactions). Primary outcomes for mothers were defined as: (PO1) the proportion of days covered (PDC) with antiretroviral therapy (ART) ≥ 0.90 during the last 24-weeks of pregnancy; and (PO2) ≥ 0.90 PDC during the first 24-weeks postpartum. Secondary outcomes were infant HIV testing according to national guidelines (at 6, 24, and 48 weeks). Crude and adjusted risk differences between study arms are reported. RESULTS We enrolled 363 pregnant WLHV. After excluding known transfers and subjects with incomplete data extraction, data were analyzed for 309 WLWH (151 SC, 158 INT). A small share achieved high PDC during the prenatal and postnatal periods (0.33 SC/0.24 INT achieved PO1; 0.30 SC/0.31 INT achieved PO2; crude or adjusted risk differences were not statistically significant). In addition, ~ 75% in both study arms completed viral load testing during year two after enrollment, with > 90% suppressed in both arms. For infants, ≥ 90% in both arms had at least one HIV test through study follow up (76 weeks) but testing on schedule according to PMTCT guidelines was uncommon. CONCLUSIONS While national guidelines in Kenya recommended that all HIV-infected pregnant women take a daily antiretroviral regimen for life following a HIV diagnosis, results presented here indicate that a minor share achieved high medication coverage during the prenatal and postnatal periods analyzed. In addition, adjustments to Mentor-Mother services showed no improvement in study outcomes. The lack of effect for this behavioral intervention is relatively consistent with the existing literature to improve mother-infant outcomes along the PMTCT care cascade. CLINICAL TRIAL NUMBER NCT02848235. Date of first trial registration 28/07/2016.
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Affiliation(s)
- Bruce A Larson
- Department of Global Health, Boston University School of Public Health, 801 Massachusetts Avenue, Boston, MA, 02118, USA.
| | - Isaac Tsikhutsu
- Kenya Medical Research Institute, Kericho, Kenya/U.S. Army Medical Research Directorate-Africa, Nairobi, Kenya
- U.S. Military HIV Research Program, Walter Reed Army Institute of Research, Silver Spring, Maryland, USA
- HJF Medical Research International, Kericho, Kenya
| | - Margaret Bii
- Kenya Medical Research Institute, Kericho, Kenya/U.S. Army Medical Research Directorate-Africa, Nairobi, Kenya
- U.S. Military HIV Research Program, Walter Reed Army Institute of Research, Silver Spring, Maryland, USA
- HJF Medical Research International, Kericho, Kenya
| | - Nafisa Halim
- Department of Global Health, Boston University School of Public Health, 801 Massachusetts Avenue, Boston, MA, 02118, USA
| | - Patricia Agaba
- U.S. Military HIV Research Program, Walter Reed Army Institute of Research, Silver Spring, Maryland, USA
- Henry M. Jackson Foundation for the Advancement of Military Medicine, Bethesda, MD, USA
| | - William Sugut
- Kenya Medical Research Institute, Kericho, Kenya/U.S. Army Medical Research Directorate-Africa, Nairobi, Kenya
- U.S. Military HIV Research Program, Walter Reed Army Institute of Research, Silver Spring, Maryland, USA
- HJF Medical Research International, Kericho, Kenya
| | - Jane Muli
- Kenya Medical Research Institute, Kericho, Kenya/U.S. Army Medical Research Directorate-Africa, Nairobi, Kenya
- U.S. Military HIV Research Program, Walter Reed Army Institute of Research, Silver Spring, Maryland, USA
- HJF Medical Research International, Kericho, Kenya
| | - Fredrick Sawe
- Kenya Medical Research Institute, Kericho, Kenya/U.S. Army Medical Research Directorate-Africa, Nairobi, Kenya
- U.S. Military HIV Research Program, Walter Reed Army Institute of Research, Silver Spring, Maryland, USA
- HJF Medical Research International, Kericho, Kenya
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