Funding for this research was provided by:
Wellcome Trust (105603/Z/14/Z, 203077/Z/16/Z)
Medical Research Council (MC_UU_12023/26)
Received: 18 March 2019
Accepted: 30 May 2019
First Online: 1 July 2019
Ethics approval and consent to participate
: Ethical and regulatory approval was granted by Imperial College Research Ethics Committee (ICREC, 16IC3388, initial approval: 18/08/2016), the sponsor of the study; KEMRI Scientific & Ethics Review Unit (SERU, 053/3299, initial approval: 16/08/2016) and Poisons and Pharmaceuticals board, Kenya (PPB, ECCT/16/09/01/2016(156), initial approval: 20/09/2016) and from Mbale REC (initial approval: 28/11/16) and Uganda (UNCST HS2163, initial approval: 16/01/17).
: Not applicable.
: The authors declare that they have no competing interests.