Received: 4 June 2019
Accepted: 18 February 2020
First Online: 4 March 2020
Ethics approval and consent to participate
: The South African Health and Nutrition Examination Survey (SANHANES-1) received ethical clearance from the Research Ethics Committee (REC) of the Human Science Research Council (HSRC) (REC 6/16/11/11). Adult respondents provided written consent and a parent/guardian consented on behalf of participants under the age of 18 years prior to all interviews.
: Not applicable.
: The authors declare that they have no competing interests.