Text and Data Mining valid from 2019-11-27
Received: 5 September 2019
Accepted: 4 November 2019
First Online: 27 November 2019
Ethics approval and consent to participate
: Prior informant consent was always verbally obtained before each interview. The research followed the ISE Code of Ethics Guidelines [CitationRef removed].
: Not applicable.
: The authors declare that they have no competing interests.