Funding for this research was provided by:
Agence Française de Développement (50 000 euros)
Article History
Received: 18 November 2019
Accepted: 22 April 2020
First Online: 28 May 2020
Ethics approval and consent to participate
: Not applicable.
: Not applicable.
: OMS, CE and VR have served as consultants to NGO on the issue of per diem. The funders and NGO did not take part in decisions on this study, nor in the preparation or publication of this manuscript.