Funding for this research was provided by:
Medical Research Council (MC_UU_12015/7, MC_UU_12015/7)
Newton Fund (ES/N013891/1)
National Research Foundation (UID:98561)
Ernest Oppenheimer Memorial Trust (OMT Ref. 21239/01)
Received: 29 July 2020
Accepted: 16 February 2021
First Online: 27 February 2021
Ethics approval and consent to participate
: Ethical approval was obtained from the University of the Witwatersrand’s Medical Human Research Ethics Committee (reference number: M181063). Permission to carry out the study was also obtained from the Johannesburg Health District Research Committee (DRC Ref. 2019-01-013). All participants gave informed written consent for participation, and for being audio-recorded if relevant.
: Not applicable.
: The authors declare no competing interests