Text and Data Mining valid from 2020-02-21
Received: 19 June 2019
Accepted: 13 February 2020
First Online: 21 February 2020
Ethics approval and consent to participate
: This study was approved by the Joint Research Ethics Committee of the Parirenyatwa Group of Hospitals (Harare, Zimbabwe) and the College of Health Sciences under the University of Zimbabwe (JREC57/16), and the Medical Research Council of Zimbabwe (MRCZ/B/1093). Informed written consent was sought from each participant, parent or guardian.
: All informed written consent also included an insertion that gave consent for publication of obtained data.
: The authors declare that they have no competing interests.