Funding for this research was provided by:
Wellcome Trust (207522)
Health Systems Research Initiative (MR/M018510/1)
Received: 10 December 2019
Accepted: 25 March 2020
First Online: 14 May 2020
Ethics approval and consent to participate
: Scientific and ethical approval for this study was granted by the Kenya Medical Research Institute Scientific and Ethics Review Unit (SERU 3736).
: Not applicable
: The authors declare that they have no competing interests.