Received: 3 June 2019
Accepted: 6 January 2020
First Online: 16 January 2020
Ethics approval and consent to participate
: Clearance was sought from the Biomedical Reseach Ethics Committee of the University of Zambia Ethics Committee (UNZABREC IRB00001131 of IORG0000774, reference number 061-06-17). Verbal consent was sought from all participants and their parents/guardians before conducting interviews and the ethics committee approved the verbal consent process. The rationale for seeking verbal consent was that the parents and children provided written consent and assent, respectively, at the time of recruitment in the trial and this included participation in the process evaluation, and this study was part of that evaluation. The processing charge for publishing the article was waivered because the main author is from a low income country according to World Bank definitions.
: Not applicable.
: The authors declare that they have no competing interests.