Funding for this research was provided by:
Received: 2 October 2020
Accepted: 7 January 2021
First Online: 1 February 2021
Compliance with ethical standards
: The authors declare that they have no conflict of interest.
: Informed consent was obtained from all individual participants included in the study.
: All procedures involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards. This has been approved by the local ethics committee of the medical faculty in Greifswald (No. BB 174/18).