Received: 3 January 2020
Accepted: 19 January 2021
First Online: 28 January 2021
Ethics approval and consent to participate
: This study obtained approvals from the institutions involved namely Harare Central Hospital (HCHEC 080416/21); Chitungwiza Central Hospital ethics committees (dated 28/04/16) which approved sample collection from their hospital antenatal clinics and the Joint Research Ethics Committee (JREC/341/17) for the College of Health Sciences and Parirenyatwa Group of Hospitals. The study was also approved by Medical Research Council of Zimbabwe (MRCZ A/2054) and (MRCZ/B/1403). All information of participants was kept confidential. Written informed consent from the study participants was sought and granted by the participants. All information and data regarding of the participants was kept confidential and it was only accessible to personnel involved in the study. All electronic data was password protected.
: Not Applicable.
: The authors declare that they have no competing interests.