Najfeld, Michael http://orcid.org/0000-0001-9491-1232
Hube, Robert
Kujat, Ann-Kathrin
Mayr, Hermann Otto
Thiele, Kathi
Article History
Received: 23 February 2020
Accepted: 23 September 2020
First Online: 19 October 2020
Ethics approval and consent to participate
: The Bavarian physician and surgeon association waived the ethics board approval for this trial, as it was retrospective, and no direct contact with the patients was necessary. No personal information of patients was collected, so no consent was needed to access the files.
: “Not applicable”
: The authors declare that they have no competing interests.