Funding for this research was provided by:
World Health Organization (The UNDP-UNFPA-UNICEF-WHO-World Bank Special Programme of Research, Development and Research Training in Human Reproduction (HRP), a co-sponsored program executed by the WHO, funded this work.)
Article History
Received: 25 February 2019
Accepted: 14 November 2019
First Online: 16 December 2019
Ethics approval and consent to participate
: Not applicable.
: Not applicable.
: The authors have no conflicts of interest. MA is a WHO staff member. JPC is a consultant and FK and RF were interns at WHO.