Funding for this research was provided by:
Received: 7 July 2021
Accepted: 15 December 2021
First Online: 6 January 2022
: This study was performed in accordance with the guidelines of the Declaration of Helsinki and approved by the University of Bremen Ethics Committee (Ethics Committee Number “MVP-STAT”). Informed consent was obtained from all subjects and/or their legal guardian(s).
: Not applicable.
: The authors declare that they have no competing interests.