University of Liverpool - Department of Public Health, Policy and Systems, Douala General Hospital, University of Liverpool - Department of Public Health, Policy and Systems, Kintampo Health Research Centre, University of Liverpool - Department of Public Health, Policy and Systems, Kintampo Health Research Centre, University of Liverpool - Department of Public Health, Policy and Systems, Moi University - School of Public Health, University of Liverpool - Department of Public Health, Policy and Systems, Moi University - School of Public Health, Douala General Hospital, Kintampo Health Research Centre, Kintampo Health Research Centre, University of Ghana - School of Public Health, Douala General Hospital, Moi University - School of Public Health, Kintampo Health Research Centre and University of Liverpool - Department of Public Health, Policy and Systems

University of Liverpool - Department of Public Health, Policy and Systems, Harvard University - Department of Environmental Health, Harvard University - Department of Environmental Health, Harvard University - Department of Epidemiology, Université Laval, Harvard University - Beth Israel Deaconess Medical Center, Harvard University - Department of Epidemiology, Harvard University - Beth Israel Deaconess Medical Center, Harvard Pilgrim Health Care, Harvard TH Chan School of Public Health - Department of Epidemiology and Harvard University - Harvard TH Chan School of Public Health