Funding for this research was provided by:
Norges Forskningsråd (223269, 249686)
Received: 21 September 2018
Accepted: 25 December 2018
First Online: 28 January 2019
Ethics approval and consent to participate
: Ethical approval for the study was obtained by the University of Zambia Biomedical Research Ethics Committee (009–07-17) and the Regional Ethical Committee Western Norway, Norway (2017/1191). Informed consent was given by all participants before being interviewed for the study.
: Not applicable.
: The authors declare that they have no competing interests.
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