Funding for this research was provided by:
Private Universität Witten/Herdecke gGmbH
Received: 17 March 2021
Accepted: 11 June 2021
First Online: 5 July 2021
: The study was approved by the Witten/Herdecke University Ethical Committee (224/2017). All methods performed in accordance with the Declaration of Helsinki. Written informed consent was obtained from all participants. There was no incentive for participation.
: Not applicable.
: The authors declare no conflicts of interest.