Funding for this research was provided by:
National Cancer Institute (P30 CA006516)
International Center for Genetic Engineering and Biotechnology (Arturo Falaschi fellowship)
Joint Research Grant South Africa/Switzerland Research Partnership Programme Bilateral Agreement
The South African National Research Foundation (NRF) for Professional Development Programme
Received: 27 November 2020
Accepted: 21 July 2021
First Online: 3 August 2021
: The protocol (*HREC454/2012*) was approved by the Human Research Ethics Committee of the Faculty of Health Science, University of Cape Town, South Africa. Written consent was obtained from all the participants for data and blood sample collection.
: All authors have agreed to publish this manuscript.
: The authors declare that they have no competing interests.