Received: 13 November 2020
Accepted: 18 January 2021
First Online: 4 February 2021
Ethics approval and consent to participate
: All subjects received written and verbal information about the aim and conduct of the study before the start of the study. Participation was voluntary. At the start of the study, all subjects provided written informed consent. The ethics committee (Ethikkommission bei der Medizinischen Fakultät der LMU München, Pettenkoferstr. 8a, 80,336 München) approved the study (committee’s reference number: 493–15).
: Not Applicable. (All data was recorded anonymously and does not allow any inference to the participating persons.)
: The authors declare that they have no competing interests.