Funding for this research was provided by:
United States Agency for International Development (AID-OAA-A-13-00088, AID-OAA-A-14-00037)
Received: 9 June 2021
Accepted: 29 November 2021
First Online: 6 January 2022
: The study was approved by each country’s local Institutional Review Board: Comité d’Ethique de la Recherche Biomédicale auprès du Ministère de la Santé in Madagascar (Approval number 082), National Health Research Ethics Committee (NHREC) in Nigeria (Approval number NHREC/01/01/2007-15/05/2017), and ERES Converge in Zambia (Reference Number 2018-Jun-028).
: Not applicable.
: The authors declare that they have no competing interests.