Text and Data Mining valid from 2019-01-15
Received: 14 August 2018
Accepted: 26 December 2018
First Online: 15 January 2019
Ethics approval and consent to participate
: The study was approved by the University of Zambia Biomedical Ethics Committee (REF. No 051–06-17) and the National Health Research Authority in Zambia (MH/101/23/1). Signed informed consent was obtained from individual participants before each interview.
: Not applicable.
: The authors declare that they have no competing interests.
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