Funding for this research was provided by:
Johannes Gutenberg-Universität Mainz
Received: 26 June 2020
Accepted: 9 April 2021
First Online: 15 April 2021
: The local Ethical Committee of the Medical Association of the Rhineland Palatine state (Germany, Chairperson: Andrea Wagner, MD) approved this study by letter in October 2014.
: Not applicable.
: The authors declare that they have no competing interests.