Funding for this research was provided by:
DFG Research Training Group “Life Sciences, Life Writing”
Federal Ministry of Social Affairs, Labor, Health, and Demography of the state Rhineland-Palatinate, Germany
Federal Ministry of Health, Equalities, Care, and Aging of the State North Rhine-Westphalia, Germany
Received: 7 February 2020
Accepted: 16 June 2020
First Online: 17 July 2020
Ethics approval and consent to participate
: The study design, procedure and applied questionnaires were approved by the institutional ethics review boards. Three positive ethical votes were required and received. The relevant ethical chambers of Rhineland-Palatinate (Mainz, Germany) and both ethical chambers for North Rhine-Westphalia, specifically the ethical chamber Westfalen-Lippe (Münster, Germany) and the ethical chamber of North Rhine (Düsseldorf, Germany) voted positively.
: Not applicable.
: The authors declare that they have no competing interests.