Received: 9 December 2020
Accepted: 21 May 2021
First Online: 17 June 2021
: The study was approved by the local institutional review board for human studies (Ethics Committee of the State Chamber of Physicians of Baden-Wuerttemberg, Germany, File Number F-2018-116) and performed in accordance with the Declaration of Helsinki. Written informed consent was obtained from all patients or a legal representative.
: Not applicable.
: The authors declare that they have no competing interests.