Funding for this research was provided by:
National Research Foundation (90448, 97262)
Gay Langmuir Bursary from the University of KwaZulu-Natal
Received: 31 March 2020
Accepted: 9 October 2020
First Online: 20 October 2020
Compliance with ethical standards
: The authors declare no conflicts of interest.
: All aspects of this study were approved by the University of KwaZulu-Natal’s Animal Ethics Committee (095/13/Animal). Moreover, none of the animals were harmed or put under any additional stress during the study. Due to the non-invasive and voluntary nature of the saliva collection procedure from the human subjects (i.e., the authors and two additional postgrads), the BioMedical Research Ethics Committee indicated that they did not need to review that experimental design or provide ethical approval.