Funding for this research was provided by:
Received: 21 May 2019
Accepted: 21 January 2020
First Online: 4 March 2020
Ethics approval and consent to participate
: Ethical approval for the primary field research was obtained from the Institutional Review Committee (IRC) of the principal investigator in the College of Medicine University of Ibadan, the State Ministry of Health IRC, and WHO ethical review committee (ERC). The same process was carried out in other African countries (Burkina Faso and Uganda). Ethical approval for this secondary study was obtained from the Institutional Review Board of Harvard T.H. Chan School of Public Health.
: Not applicable.
: The authors declare that they have no competing interests.