Funding for this research was provided by:
Bill and Melinda Gates Foundation (OPP1148933)
Received: 28 November 2019
Accepted: 18 March 2020
First Online: 9 April 2020
Ethics approval and consent to participate
: This paper is based solely on publicly available data from Demographic and Health Surveys (DHS), modified version of DHS, Multiple Indicator Cluster Survey (MICS), and Reproductive Health Surveys (RHS). Ethical clearance was obtained by the institutions that conducted the surveys in each country.
: Not applicable.
: The authors declare that they have no competing interests.