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Nilsson PM, Pikkemaat M, Schutte AE. Sustainable hypertension care - a new strategy for an expanding problem. J Hypertens 2024; 42:1891-1894. [PMID: 39360762 DOI: 10.1097/hjh.0000000000003842] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2024] [Accepted: 08/04/2024] [Indexed: 10/09/2024]
Affiliation(s)
- Peter M Nilsson
- Department of Clinical Sciences, Lund University, Skåne University Hospital
| | - Miriam Pikkemaat
- Center for Primary Healthcare Research, Department of Clinical Sciences, Malmö, Lund University, Malmö
- University Clinic Primary Care Skåne, Region Skåne, Sweden
- School of Population Health, University of New South Wales, The George Institute for Global Health, Sydney, Australia
| | - Aletta E Schutte
- School of Population Health, University of New South Wales, The George Institute for Global Health, Sydney, Australia
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Chay J, Su RJ, Kamano JH, Andama B, Bloomfield GS, Delong AK, Horowitz CR, Menya D, Mugo R, Orango V, Pastakia SD, Wanyonyi C, Vedanthan R, Finkelstein EA. Cost-effectiveness of group medical visits and microfinance interventions versus usual care to manage hypertension in Kenya: a secondary modelling analysis of data from the Bridging Income Generation with Group Integrated Care (BIGPIC) trial. Lancet Glob Health 2024; 12:e1331-e1342. [PMID: 39030063 DOI: 10.1016/s2214-109x(24)00188-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2023] [Revised: 03/14/2024] [Accepted: 04/23/2024] [Indexed: 07/21/2024]
Abstract
BACKGROUND The Bridging Income Generation with Group Integrated Care (BIGPIC) trial in rural Kenya showed that integrating usual care with group medical visits or microfinance interventions reduced systolic blood pressure and cardiovascular risk in participants. We aimed to estimate the incremental cost-effectiveness of three BIGPIC interventions for a modelled cohort and by sex, as well as the cost of implementing these interventions. METHODS For this analysis, we used data collected during the BIGPIC trial, a four-group, cluster-randomised trial conducted in the western Kenyan catchment area of the Academic Model Providing Access to Healthcare. BIGPIC enrolled participants from 24 rural health facilities in rural western Kenya aged 35 years or older with either increased blood pressure or diabetes. Participants were assigned to receive either usual care, group medical visits, microfinance, or a combination of group medical visits and microfinance (GMV-MF). Our model estimated the incremental cost-effectiveness of the three BIGPIC interventions via seven health states (ie, a hypertensive state, five chronic cardiovascular-disease states, and a death state) by simulating transitions between health states for a hypothetical cohort of individuals with hypertension on the basis of QRISK3 scores. In every cycle, participants accrued costs and disability-adjusted life-years (DALYs) associated with their health state. Incremental cost-effectiveness ratios (ICERs) were calculated for the entire modelled cohort and by sex by dividing the incremental cost by the incremental effectiveness of the next most expensive intervention. The main outcome of this analysis was ICERs for each intervention evaluated. This analysis is registered at ClinicalTrials.gov (NCT02501746). FINDINGS Between Feb 6, 2017, and Dec 29, 2019, 2890 people were recruited to the BIGPIC trial. 2020 (69·9%) of 2890 participants were female and 870 (30·1%) were male. At baseline, mean QRISK3 score was 11·5 (95% CI 11·1-11·9) for the trial population, 11·9 (11·5-12·2) for male participants, and 11·3 (11·0-11·6) for female participants. For the population of Kenya, group medical visits were estimated to cost US$7 more per individual than usual care and result in 0·005 more DALYs averted (ICER $1455 per DALY averted). Microfinance was estimated to cost $19 more than group medical visits but was only estimated to avert 0·001 more DALYs. Relative to group medical visits, GMV-MF was estimated to cost $29 more and avert 0·009 more DALYs ($3235 per DALY averted). Relative to usual care, GMV-MF was estimated to cost $37 more and avert 0·014 more DALYs ($2601 per DALY averted). In the first year of the intervention, usual care was estimated to be the least expensive intervention to implement ($87 per participant; $10 238 per health-facility catchment area [HFCA]), then group medical visits ($99 per participant; $12 268 per HFCA), then microfinance ($120 per participant; $14 172 per HFCA), with GMV-MF estimated to be the most expensive intervention to implement ($139 per participant; $16 913 per HFCA). INTERPRETATION Group medical visits and GMV-MF were estimated to be cost-effective strategies to improve blood-pressure control in rural Kenya. However, which intervention to pursue depends on resource availability. Policy makers should consider these factors, in addition to sex differences in programme effectiveness, when selecting optimal implementation strategies. FUNDING US National Institutes of Health.
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Affiliation(s)
- Junxing Chay
- Health Services and Systems Research, Duke-NUS Medical School, Singapore.
| | - Rebecca J Su
- Health Services and Systems Research, Duke-NUS Medical School, Singapore
| | - Jemima H Kamano
- School of Medicine, Moi University College of Health Sciences, Eldoret, Kenya
| | - Benjamin Andama
- Academic Model Providing Access to Healthcare, Eldoret, Kenya
| | | | - Allison K Delong
- Center for Statistical Sciences, Brown University, Providence, RI, USA
| | - Carol R Horowitz
- Institute for Health Equity Research, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Diana Menya
- School of Medicine, Moi University College of Health Sciences, Eldoret, Kenya
| | - Richard Mugo
- Academic Model Providing Access to Healthcare, Eldoret, Kenya
| | - Vitalis Orango
- Academic Model Providing Access to Healthcare, Eldoret, Kenya
| | - Sonak D Pastakia
- Department of Pharmacy Practice, Purdue University College of Pharmacy, West Lafayette, IN, USA
| | | | - Rajesh Vedanthan
- Department of Population Health, Grossman School of Medicine, New York University, New York, NY, USA
| | - Eric A Finkelstein
- Health Services and Systems Research, Duke-NUS Medical School, Singapore; Duke Global Health Institute, Duke University, Durham, NC, USA
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Gooden TE, Mkhoi ML, Mwalukunga LJ, Mdoe M, Senkoro E, Kibusi SM, Thomas GN, Nirantharakumar K, Manaseki-Holland S, Greenfield S. Exploring the preferred integration approach for HIV, diabetes and hypertension care and associated barriers and facilitators in Central Tanzania: An exploratory qualitative study. PLOS GLOBAL PUBLIC HEALTH 2024; 4:e0003510. [PMID: 39046965 PMCID: PMC11268702 DOI: 10.1371/journal.pgph.0003510] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/14/2023] [Accepted: 06/28/2024] [Indexed: 07/27/2024]
Abstract
Timely diagnosis and management of diabetes and hypertension among people living with HIV (PLWH) is imperative; however, many barriers exist within the current model of care for these comorbidities. We aimed to understand how HIV, diabetes, and hypertension care should be delivered and the associated barriers and facilitators for the preferred delivery approach. We conducted semi-structured interviews with 16 PLWH with comorbidities of diabetes and/or hypertension (referred to hereafter as non-communicable diseases [NCDs]), 10 healthcare professionals (HCPs) that provide care for NCDs, and 10 HCPs that provide care for HIV. Participants were recruited from two healthcare facilities in Dodoma, Tanzania and interviewed in Swahili. Interviews were audio recorded, transcribed verbatim and translated into English. We used the differentiated service delivery building blocks as a framework to determine where, who, what and when care should be provided. We applied the Theoretical Domains Framework (TDF) to HCP transcripts to determine barriers and facilitators for the preferred integration approach. There was a consensus among participants that all care for NCDs should be provided for PLWH at HIV clinics (known as care and treatment centres [CTCs]) by either CTC doctors or NCD specialists. Participants preferred flexible follow-up care for NCDs and for it to be aligned with HIV follow-up appointments. The main barriers were mapped to the TDF domains of environmental context and resources, and social influences; the former included the lack of NCD medications, NCD diagnostic equipment, space, staff and guidelines whereas the latter included negative influences from peers and traditional healers. Several facilitators were mentioned regarding CTC HCPs' knowledge, skills, optimism and beliefs regarding their capabilities to care for PLWH with NCDs. The preferred integration approach should be tested, utilising the enabling factors described. The barriers described must be addressed with or without integration to achieve optimal care for PLWH with NCDs.
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Affiliation(s)
- Tiffany E. Gooden
- Institute of Applied Health Research, University of Birmingham, Birmingham, United Kingdom
| | - Mkhoi L. Mkhoi
- Department of Microbiology and Parasitology, University of Dodoma, Dodoma, Tanzania
| | | | - Mwajuma Mdoe
- Department of Public Health, University of Dodoma, Dodoma, Tanzania
| | | | | | - G. Neil Thomas
- Institute of Applied Health Research, University of Birmingham, Birmingham, United Kingdom
| | | | | | - Sheila Greenfield
- Institute of Applied Health Research, University of Birmingham, Birmingham, United Kingdom
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Nilsson PM. Sustainable hypertension care - How can it be achieved? J Intern Med 2023; 294:242-244. [PMID: 37424189 DOI: 10.1111/joim.13692] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 07/11/2023]
Affiliation(s)
- Peter M Nilsson
- Department of Clinical Sciences, Lund University, Skane University Hospital, Malmö, Sweden
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Aifah AA, Hade EM, Colvin C, Henry D, Mishra S, Rakhra A, Onakomaiya D, Ekanem A, Shedul G, Bansal GP, Lew D, Kanneh N, Osagie S, Udoh E, Okon E, Iwelunmor J, Attah A, Ogedegbe G, Ojji D. Study design and protocol of a stepped wedge cluster randomized trial using a practical implementation strategy as a model for hypertension-HIV integration - the MAP-IT trial. Implement Sci 2023; 18:14. [PMID: 37165382 PMCID: PMC10173657 DOI: 10.1186/s13012-023-01272-5] [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: 03/22/2023] [Accepted: 04/21/2023] [Indexed: 05/12/2023] Open
Abstract
BACKGROUND As people living with HIV (PLWH) experience earlier and more pronounced onset of noncommunicable diseases (NCDs), advancing integrated care networks and models in low-resource-high-need settings is critical. Leveraging current health system initiatives and addressing gaps in treatment for PLWH, we report our approach using a late-stage (T4) implementation research study to test the adoption and sustainability of a proven-effective implementation strategy which has been minimally applied in low-resource settings for the integration of hypertension control into HIV treatment. We detail our protocol for the Managing Hypertension Among People Living with HIV: an Integrated Model (MAP-IT) trial, which uses a stepped wedge cluster randomized trial (SW-CRT) design to evaluate the effectiveness of practice facilitation on the adoption of a hypertension treatment program for PLWH receiving care at primary healthcare centers (PHCs) in Akwa Ibom State, Nigeria. DESIGN In partnership with the Nigerian Federal Ministry of Health (FMOH) and community organizations, the MAP-IT trial takes place in 30 PHCs. The i-PARiHS framework guided pre-implementation needs assessment. The RE-AIM framework will guide post-implementation activities to evaluate the effect of practice facilitation on the adoption, implementation fidelity, and sustainability of a hypertension program, as well as blood pressure (BP) control. Using a SW-CRT design, PHCs sequentially crossover from the hypertension program only (usual care) to hypertension plus practice facilitation (experimental condition). PHCs will recruit and enroll an average of 28-32 patients to reach a maximum of 960 PLWH participants with uncontrolled hypertension who will be followed longitudinally for BP outcomes. DISCUSSION Given the need for integrated NCD-HIV care platforms in low-resource settings, MAP-IT will underscore the challenges and opportunities for integrating hypertension treatment into HIV care, particularly concerning adoption and sustainability. The evaluation of our integration approach will also highlight the potential impact of a health systems strengthening approach on BP control among PLWH. TRIAL REGISTRATION Clinicaltrials.gov ( NCT05031819 ). Registered on 2nd September 2021.
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Affiliation(s)
- Angela A Aifah
- Institute for Excellence in Health Equity, New York University (NYU) Grossman School of Medicine, New York, NY, USA.
- Department of Population Health, New York University (NYU) Grossman School of Medicine, New York, NY, USA.
| | - Erinn M Hade
- Department of Population Health, New York University (NYU) Grossman School of Medicine, New York, NY, USA
| | - Calvin Colvin
- Institute for Excellence in Health Equity, New York University (NYU) Grossman School of Medicine, New York, NY, USA
| | - Daniel Henry
- Cardiovascular Research Unit, University of Abuja Teaching Hospital, University of Abuja, Gwagwalada, Abuja, Nigeria
| | - Shivani Mishra
- Institute for Excellence in Health Equity, New York University (NYU) Grossman School of Medicine, New York, NY, USA
| | - Ashlin Rakhra
- Department of Population Health, New York University (NYU) Grossman School of Medicine, New York, NY, USA
| | - Deborah Onakomaiya
- Department of Population Health, New York University (NYU) Grossman School of Medicine, New York, NY, USA
| | - Anyiekere Ekanem
- Department of Community Medicine, Faculty of Clinical Sciences, University of Uyo, Uyo, Akwa Ibom State, Nigeria
| | - Gabriel Shedul
- Cardiovascular Research Unit, University of Abuja Teaching Hospital, University of Abuja, Gwagwalada, Abuja, Nigeria
- Department of Family Medicine, University of Abuja Teaching Hospital, Gwagwalada, Abuja, Nigeria
| | | | - Daphne Lew
- Washington University in St. Louis School of Medicine, St. Louis, USA
| | - Nafesa Kanneh
- Institute for Excellence in Health Equity, New York University (NYU) Grossman School of Medicine, New York, NY, USA
| | - Samuel Osagie
- Cardiovascular Research Unit, University of Abuja Teaching Hospital, University of Abuja, Gwagwalada, Abuja, Nigeria
| | - Ememobong Udoh
- Cardiovascular Research Unit, University of Abuja Teaching Hospital, University of Abuja, Gwagwalada, Abuja, Nigeria
| | - Esther Okon
- Cardiovascular Research Unit, University of Abuja Teaching Hospital, University of Abuja, Gwagwalada, Abuja, Nigeria
| | - Juliet Iwelunmor
- Department of Behavioral Science and Health Education, College for Public Health and Social Justice, Saint Louis University, St. Louis, USA
| | - Angela Attah
- Akwa Ibom Primary Healthcare Development Board, State Primary Health Care Development Board, Uyo, Akwa Ibom State, Nigeria
| | - Gbenga Ogedegbe
- Institute for Excellence in Health Equity, New York University (NYU) Grossman School of Medicine, New York, NY, USA
| | - Dike Ojji
- Department of Internal Medicine, Faculty of Clinical Sciences, College of Health Sciences, University of Abuja, Gwagwalada, Abuja, Nigeria
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Godfrey C, Vallabhaneni S, Shah MP, Grimsrud A. Providing differentiated service delivery to the ageing population of people living with HIV. J Int AIDS Soc 2022; 25 Suppl 4:e26002. [PMID: 36176025 PMCID: PMC9522630 DOI: 10.1002/jia2.26002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2022] [Accepted: 08/01/2022] [Indexed: 12/05/2022] Open
Abstract
Introduction Differentiated service delivery (DSD) models for HIV are a person‐centred approach to providing services across the HIV care cascade; DSD has an increasing policy and implementation support in high‐burden HIV countries. The life‐course approach to DSD for HIV treatment has focused on earlier life phases, childhood and adolescence, families, and supporting sexual and reproductive health during childbearing years. Older adults, defined as those over the age of 50, represent a growing proportion of HIV treatment cohorts with approximately 20% of those supported by PEPFAR in this age band and have specific health needs that differ from younger populations. Despite this, DSD models have not been designed or implemented to address the health needs of older adults. Discussion Older adults living with HIV are more likely to have significant co‐morbid medical conditions. In addition to the commonly discussed co‐morbidities of hypertension and diabetes, they are at increased risk of cognitive impairment, frailty and mental health conditions. Age and HIV‐related cognitive impairment may necessitate the development of adapted educational materials. Identifying the optimal package of differentiated services to this population, including the frequency of clinical visits, types and location of services is important as is capacitating the healthcare cadres to adapt to these challenges. Technological advances, which have made remote monitoring of adherence and other aspects of disease management easier for younger populations, may not be as readily available or as familiar to older adults. To date, adaptations to service delivery have not been scaled and are limited to nascent programmes working to integrate treatment of common co‐morbidities. Conclusions Older individuals living with HIV may benefit from a DSD approach that adapts care to the specific challenges of ageing with HIV. Models could be developed and validated using outcome measures, such as viral suppression and treatment continuity. DSD models for older adults should consider their specific health needs, such as high rates of co‐morbidities. This may require educational materials, health worker capacity building and outreach designed specifically to treat this age group.
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Affiliation(s)
- Catherine Godfrey
- Office of the Global AIDS Coordinator, Department of StateWashingtonDCUSA
| | - Snigdha Vallabhaneni
- Division of Global HIV and TB, U.S Centers for Disease Control and PreventionAtlantaGeorgiaUSA
| | - Minesh Pradyuman Shah
- Division of Global HIV and TB, U.S Centers for Disease Control and PreventionAtlantaGeorgiaUSA
| | - Anna Grimsrud
- HIV Programmes and Advocacy, IAS – the International AIDS SocietyCape TownSouth Africa
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Arsenault C, Gage A, Kim MK, Kapoor NR, Akweongo P, Amponsah F, Aryal A, Asai D, Awoonor-Williams JK, Ayele W, Bedregal P, Doubova SV, Dulal M, Gadeka DD, Gordon-Strachan G, Mariam DH, Hensman D, Joseph JP, Kaewkamjornchai P, Eshetu MK, Gelaw SK, Kubota S, Leerapan B, Margozzini P, Mebratie AD, Mehata S, Moshabela M, Mthethwa L, Nega A, Oh J, Park S, Passi-Solar Á, Pérez-Cuevas R, Phengsavanh A, Reddy T, Rittiphairoj T, Sapag JC, Thermidor R, Tlou B, Valenzuela Guiñez F, Bauhoff S, Kruk ME. COVID-19 and resilience of healthcare systems in ten countries. Nat Med 2022; 28:1314-1324. [PMID: 35288697 PMCID: PMC9205770 DOI: 10.1038/s41591-022-01750-1] [Citation(s) in RCA: 153] [Impact Index Per Article: 76.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2021] [Accepted: 02/17/2022] [Indexed: 02/07/2023]
Abstract
Declines in health service use during the Coronavirus Disease 2019 (COVID-19) pandemic could have important effects on population health. In this study, we used an interrupted time series design to assess the immediate effect of the pandemic on 31 health services in two low-income (Ethiopia and Haiti), six middle-income (Ghana, Lao People's Democratic Republic, Mexico, Nepal, South Africa and Thailand) and high-income (Chile and South Korea) countries. Despite efforts to maintain health services, disruptions of varying magnitude and duration were found in every country, with no clear patterns by country income group or pandemic intensity. Disruptions in health services often preceded COVID-19 waves. Cancer screenings, TB screening and detection and HIV testing were most affected (26-96% declines). Total outpatient visits declined by 9-40% at national levels and remained lower than predicted by the end of 2020. Maternal health services were disrupted in approximately half of the countries, with declines ranging from 5% to 33%. Child vaccinations were disrupted for shorter periods, but we estimate that catch-up campaigns might not have reached all children missed. By contrast, provision of antiretrovirals for HIV was not affected. By the end of 2020, substantial disruptions remained in half of the countries. Preliminary data for 2021 indicate that disruptions likely persisted. Although a portion of the declines observed might result from decreased needs during lockdowns (from fewer infectious illnesses or injuries), a larger share likely reflects a shortfall of health system resilience. Countries must plan to compensate for missed healthcare during the current pandemic and invest in strategies for better health system resilience for future emergencies.
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Affiliation(s)
- Catherine Arsenault
- Department of Global Health and Population, Harvard T.H. Chan School of Public Health, Boston MA, USA.
| | - Anna Gage
- Department of Global Health and Population, Harvard T.H. Chan School of Public Health, Boston MA, USA
| | - Min Kyung Kim
- Seoul National University College of Medicine, Seoul, South Korea
| | - Neena R Kapoor
- Department of Global Health and Population, Harvard T.H. Chan School of Public Health, Boston MA, USA
| | | | - Freddie Amponsah
- Policy, Planning, Monitoring and Evaluation, Ghana Health Services, Accra, Ghana
| | - Amit Aryal
- Office of the Member of Federal Parliament Gagan Kumar Thapa, Kathmandu, Nepal
| | - Daisuke Asai
- World Health Organization, Vientiane, Lao People's Democratic Republic, Vientiane, Laos
| | | | - Wondimu Ayele
- School of Public Health, Addis Ababa University, Addis Ababa, Ethiopia
| | - Paula Bedregal
- Public Health Department, Faculty of Medicine, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Svetlana V Doubova
- Epidemiology and Health Services Research Unit CMN Siglo XXI, Mexican Institute of Social Security, Mexico City, Mexico
| | - Mahesh Dulal
- Office of the Member of Federal Parliament Gagan Kumar Thapa, Kathmandu, Nepal
| | | | | | | | - Dilipkumar Hensman
- World Health Organization, Vientiane, Lao People's Democratic Republic, Vientiane, Laos
| | - Jean Paul Joseph
- Hôpital Universitaire de Mirebalais, Zanmi Lasante, Arrondissement de Mirebalais, Mirebalais, Haïti
| | | | | | | | - Shogo Kubota
- World Health Organization, Vientiane, Lao People's Democratic Republic, Vientiane, Laos
| | - Borwornsom Leerapan
- Faculty of Medicine Ramathibodi Hospital, Madidol University, Bangkok, Thailand
| | - Paula Margozzini
- Public Health Department, Faculty of Medicine, Pontificia Universidad Católica de Chile, Santiago, Chile
| | | | - Suresh Mehata
- Ministry of Health and Population, Government of Nepal, Kathmandu, Nepal
| | - Mosa Moshabela
- School of Nursing and Public Health, University of KwaZulu-Natal, Durban, South Africa
| | - Londiwe Mthethwa
- School of Nursing and Public Health, University of KwaZulu-Natal, Durban, South Africa
| | - Adiam Nega
- School of Public Health, Addis Ababa University, Addis Ababa, Ethiopia
| | - Juhwan Oh
- Seoul National University College of Medicine, Seoul, South Korea
| | - Sookyung Park
- Korea National Health Insurance Services, Health Insurance Research Institute, Gangwon-do, South Korea
| | - Álvaro Passi-Solar
- Public Health Department, Faculty of Medicine, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Ricardo Pérez-Cuevas
- Division of Social Protection and Health, Inter-American Development Bank, Kingston, Jamaica
| | - Alongkhone Phengsavanh
- Faculty of Medicine, University of Health Sciences, Vientiane, Lao People's Democratic Republic, Vientiane, Laos
| | - Tarylee Reddy
- Biostatistics Unit, South African Medical Research Council, Durban, South Africa
| | | | - Jaime C Sapag
- Public Health Department, Faculty of Medicine, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Roody Thermidor
- Studies and Planning Unit, Ministry of Public Health and Population, Port-au-Prince, Haiti
| | - Boikhutso Tlou
- School of Nursing and Public Health, University of KwaZulu-Natal, Durban, South Africa
| | | | - Sebastian Bauhoff
- Department of Global Health and Population, Harvard T.H. Chan School of Public Health, Boston MA, USA
| | - Margaret E Kruk
- Department of Global Health and Population, Harvard T.H. Chan School of Public Health, Boston MA, USA
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