Received: 11 December 2019
Accepted: 28 May 2020
First Online: 8 June 2020
Ethics approval and consent to participate
: The study was approved by the ethic’s board of the medical association of Westphalia-Lippe and the University of Münster, Germany, study code 2018–690-f-S.
: Not applicable.
: The authors declare that they have no competing interests.