Funding for this research was provided by:
Medical Research Council
South African Medical Research Council
Global Alliance for Chronic Disease
Received: 15 April 2020
Accepted: 17 December 2020
First Online: 15 January 2021
Ethics approval and consent to participate
: The protocol was approved by the University of Oxford Tropical Research Ethics Committee (OXTREC, ref.: 22-15); the University of Cape Town Research Ethics Committee (UCT HREC REF: 126/2015), the University of Witwatersrand Research Ethics Committee (R14/49) and the Malawi National Health Services Research Committee (NHSRC #15/7/1425). In addition, the relevant health authorities granted permission for the study, including the intervention development work. All participants who were included in the formative study provided written, informed consent to participate.
: Not applicable.
: The authors have declared that they have no competing interests.