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Article History

Received: 20 February 2021

Accepted: 10 June 2021

First Online: 6 July 2021

Declarations

:

: The evaluation of the patient data was irreversibly anonymized and does not allow any conclusions to be drawn about the individual persons, thus, no other form of informed consent is required.Furthermore, informed consent from patients was not necessary according to local legislation (Bavarian Hospital Act, Bayerisches Krankenhausgesetz, Art. 24, Abs 4). The use of patient data for any further analysis was approved and confirmed by the local ethics committee.

: All steps of data acquisition and analysis took place in accordance with the ethical standard of the institutional review board and with the Declaration of Helsinki and were approved by the local ethics committee of the Medical faculty of the Technical University of Munich (reference number 367/19). With the approval by the ethics committee administrative permission to access the data was granted. All patient-related data was anonymized and only accessible to authorized researchers.The ethics vote for this retrospective analysis is available in writing. No other form of explicit informed consent was necessary.

: The authors declare that they have no competing interests.