Funding for this research was provided by:
Ministry of Culture and Science of the German State North Rhine-Westphalia
Received: 6 October 2020
Accepted: 1 July 2021
First Online: 26 August 2021
: This study was performed in line with the principles of the Declaration of Helsinki. Approval was granted by the Ethics Committee of Bielefeld University (04.04.2017/2017–072W). Written informed consent was obtained from all individual participants included in the study.
: Not Applicable.
: The authors declare that they have no competing interests.