Received: 15 February 2019
Accepted: 20 May 2019
First Online: 7 June 2019
Ethics approval and consent to participate
: The research protocol was approved by the cantonal research ethics commission. The following number was assigned to the study: Req-2017-00211. The ethics committee approved implicit consent by returning the participants’ questionnaire.
: Not applicable.
: The authors declare that they have no competing interests.