Funding for this research was provided by:
Department of Science and Technology, Republic of South Africa (DST/CON 0077/2014)
Österreichische Agentur für Internationale Mobilität und Kooperation in Bildung, Wissenschaft und Forschung (KEF-Projekt P202)
South African National Research Foundation (SARChI GUN 86895)
Belgian Science Policy (BL/67/eranet03)
Received: 13 May 2020
Accepted: 17 June 2020
First Online: 3 July 2020
Ethics approval and consent to participate
: The EndoAfrica study has received ethics approval from the Health Research Ethics Committee (HREC) of Stellenbosch University (reference numbers: N13/05/064 S16/07/114), and the EndoAfrica-NWU study of HREC of the North-West University (reference number NWU-00045-15-A1). The study was conducted according to the ethical guidelines and principles of the international Declaration of Helsinki, South African Guidelines for Good Clinical Practice and the Medical Research Council of South Africa Ethical Guidelines for Research. All the participants signed the informed consent form after a detailed description of the study and planned measurements were conveyed to them in their native language. Participants were allowed to withdraw from the study at any time.
: Not applicable.
: All authors declare that they have no competing interest.