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Article History

Received: 24 October 2018

Accepted: 15 January 2019

First Online: 23 January 2019

Ethics approval and consent to participate

: The Medical Ethics Review Committee of the University Medical Center Utrecht, the Netherlands, reviewed the study protocol (protocol 17–801/C) and confirmed that formal approval was not required, since the Medical Research Involving Human Subjects Act (WMO) does not apply.Participation was voluntary, and only after written informed consent. Participants were informed that the interviews would be tape-recorded and data would be treated anonymously, confidentially and stored securely in accordance with data protection legislation. Interview tapes and transcripts were coded to protect interviewee anonymity and access to codes was restricted to the interviewers.

: Not applicable.

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