Funding for this research was provided by:
National Research Foundation (CPRR150708124403 / 98944)
Received: 17 February 2019
Accepted: 30 June 2019
First Online: 8 July 2019
Ethics approval and consent to participate
: Ethics approval was given by the Health Research Ethics Committee (HREC) of Stellenbosch University (N15/05/041). Approval was also granted by the Western Cape Department of Health and institutional approval to study students by the University of Stellenbosch. Informed written consent was obtained from study participants.
: Not applicable.
: The authors declare that they have no competing interests.