Received: 7 September 2020
Accepted: 17 June 2021
First Online: 30 June 2021
: The study was administratively authorized by the Provincial Health Directorate of Zambezia and received authorization from the National Committee on Bioethics in Health (Ref 308/CNBS/2018).The participants were informed about the objectives of the study. They signed an informed consent document to ensure the willingness of participation and they were free to withdraw from the study at any time. Identification numbers were used instead of participant names to maintain the confidentiality throughout the study.
: Not applicable.
: The authors declare that they have no competing interests.