Funding for this research was provided by:
Medical Research Council (MR/S014535/1)
Global Challenges Research Fund (QR GCRF University of Leeds)
Received: 4 January 2021
Accepted: 1 June 2021
First Online: 15 June 2021
: Ethical committee approval was granted by the Institutional Review Boards of University of Leeds (Ref: MREC 18-032), Research Council of Zimbabwe (Ref: 03507), Medical Research Council of Zimbabwe (Ref: MRCZ/A/2421), Uganda Cancer Institute (Ref: 19-2018), Uganda National Council of Science and Technology (Ref: HS325ES) and College of Medicine University of Lagos (Ref: HREC/15/04/2015). All study participants provided written informed consent for study participation, data analysis, and publication. All methods were performed in accordance with the Medical Research Council good research practice guidelines [CitationRef removed] and H3 Africa framework for conducting ethically responsible biomedical research [CitationRef removed].
: Not applicable.
: The authors declare that they have no competing interests.