Received: 30 November 2021
Accepted: 11 March 2022
First Online: 1 April 2022
: Before inclusion of patient records in the database, a written informed consent on study participation was obtained. The study was approved by the ethical committee of the Ärztekammer Bremen, Germany. In accordance to the Declaration of Helsinki the study was performed with approved protocols conducted by trained investigators subject to independent ethical review and under oversight by a properly convened committee.
: Not applicable.
: The authors declare that they have no competing interests.