Received: 3 September 2020
Accepted: 30 November 2020
First Online: 17 December 2020
Ethics approval and consent to participate
: Written informed consent was available for all participants in both studies. Ethical approval was granted by the ethics commission of the University of Ulm (May, Application No. 153/18), and by the ethics commission of the State Medical Chamber of Baden-Württemberg (March 2019, Application No. B-F-2019-022). The studies were registered with the German Register of Clinical Trials in 2018 (DRKS-ID: DRKS00015057).
: Not applicable.
: The authors declare that they have no competing interests.