Received: 15 August 2018
Accepted: 7 February 2020
First Online: 14 February 2020
Ethics approval and consent to participate
: The Ethical Committee of the Chamber of Physicians of Mecklenburg-Western Pomerania (Germany) approved the study protocol (registry number BB 20/11). Written informed consent was obtained from all participants.
: Not Applicable.
: The authors state that there are no conflicts of interest.