Article History
Received: 4 February 2020
Accepted: 8 December 2020
First Online: 21 December 2020
Ethics approval and consent to participate
: The Ethics Committee of the University of Luebeck consented to the study in April 2015 (15–080, 02.04.2015). All participants gave informed consent by signing a consent form prior to the interview. They were informed that their participation was voluntary. They were able to withdraw their participation at any time without a need for declaring a reason.
: The authors declare that they have no competing interests.