Received: 26 November 2021
Accepted: 1 June 2022
First Online: 20 June 2022
: Research was performed in accordance with the guidelines as set out by the Declaration of Helsinki. Ethical approval with waiver of informed consent for this study was obtained from the Health Research Ethics Committee (HREC) of the University of Cape Town (HREC REF: 285-2020) for GSH and the Stellenbosch University HREC for TBH (N20/04/002_COVID-19) and KDH (N20/05/020_COVID-19). Administrative permissions to obtain data was granted by all three hospitals.
: Not applicable.
: The authors declare that they have no competing interests.