Received: 14 July 2020
Accepted: 3 September 2020
First Online: 29 September 2020
Ethics approval and consent to participate
: The study was approved by the ethics committee of the University of Heidelberg with a waiver of informed consent for patients (S-082/2018). The observers selected for rating the reports consented in written form to study participation and use of their personal data.
: Not applicable.
: There are no competing interests.