Funding for this research was provided by:
Received: 16 April 2020
Accepted: 13 April 2021
First Online: 21 April 2021
: Research grants have been made available by the Deutsche Rentenversicherung Mitteldeutschland. Nevertheless, the authors state that there is no conflict of interest.
: The vote of the ethics committee of the Martin-Luther-University Halle-Wittenberg was obtained for the investigation (Ethics vote number: 2016–153).
: All authors gave their Consent for publication.