Funding for this research was provided by:
Poliomyelitis Research Foundation (18/12)
South African Research Chairs Initiative (64809)
Victor Daitz Foundation
Received: 17 August 2021
Accepted: 11 January 2022
First Online: 26 January 2022
: Ethical approval for the present study was obtained from the Biomedical Research Ethics Committee of the University of KwaZulu-Natal (BREC/00002085/2020). Written informed consent was obtained from all study participants at the time of recruitment and patient identity remained confidential.
: Not applicable.
: The authors declare that they have no competing interests.