Funding for this research was provided by:
United States Agency for International Development (USAID-M-OAA-GH-08-923)
Received: 21 August 2016
Accepted: 7 August 2017
First Online: 15 August 2017
Ethics approval and consent to participate
: The protocol was approved by the National Research Ethics Committee (CONEP <b>N°</b> 520/2011; Register: 16,571 – Process: n° 25,000.115789/2011–94) and by the Ethics Advisory Group at The Union, number: 11/11. The protocol was also approved by each appropriate local Institutional Review Board and Ethics Committee.
: Not applicable.
: The authors declare that they have no competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.