Funding for this research was provided by:
International Development Research Centre (108030)
Received: 12 September 2019
Accepted: 2 March 2020
First Online: 18 March 2020
Ethics approval and consent to participate
: Approval was obtained from the research ethics boards of the Malawi College of Medicine (P.08/15/1783) and the University of British Columbia (H15–01463-A003).
: Not applicable.
: The authors declare that they have no competing interests.