Received: 18 May 2019
Accepted: 28 August 2019
First Online: 4 October 2019
Ethics approval and consent to participate
: The study protocol was approved by the Radboudumc medical ethical committee (<i>NL2017–3862</i>). All participating physicians signed an informed consent before the interview took place.
: not applicable.
: The authors declare that they have no competing interests.