Funding for this research was provided by:
South African Medical Research Council
Received: 28 February 2019
Accepted: 20 June 2019
First Online: 10 July 2019
Ethics approval and consent to participate
: This study has been approved by the appropriate ethics committee and has therefore been performed in accordance with the ethical standards laid down in the 1964 Declaration of Helsinki and its later amendments. Ethical approval was obtained from the Health Science Research Ethics Committee of the University of Cape Town (Reference: 744/2015) and Stellenbosch University (Reference: N13/10/149). Permission to conduct the study was obtained from both universities. Participation in the study was entirely voluntary and participants provided informed consent electronically prior to completing the survey.
: Not applicable.
: The authors declare that they have no competing interests.