Received: 27 October 2020
Accepted: 3 March 2021
First Online: 14 April 2021
: Ethics clearance was approved by the University of Cape Town’s Human Research Ethics Committee (HREC ref. no: 095/2018) and the NHS, Invasive or Clinical Research Committee at the University of Stirling (NICR:17/18). The study was performed in accordance with the principles of the Declaration of Helsinki (1964, amended last in Fortaleza Brazil, 2013), ICH Good Clinical Practice (GCP), and the laws of South Africa. Verbal and written informed consent were obtained from all participants prior to participant screening and all testing procedures.
: Not applicable.
: The author(s) declare that they have no completing interests.