Funding for this research was provided by:
World Bank Group (n/a)
United Nations Fund for Population Activities (n/a)
Organisation mondiale de la Sante (n/a)
Received: 8 October 2019
Accepted: 8 June 2020
First Online: 31 July 2020
Ethics approval and consent to participate
: Not applicable, as it is already included in the manuscript.
: Not applicable.
: Authors declare there is no conflict of interest.