Schubert, Julia http://orcid.org/0000-0003-3234-4724
Timmesfeld, Nina
Noever, Kathrin
Arabin, Birgit
Article History
Received: 1 October 2019
Accepted: 13 January 2020
First Online: 29 January 2020
Compliance with ethical standards
:
: The authors declare that they have no competing interests.
: This study is an analysis of exclusively anonymized secondary data. In accordance with the guidelines of the working group of secondary data analyses (AGENS) as part of DGSMP and DGEpi [CitationRef removed], it was not submitted to an ethical committee.
: Informed consent was not necessary because the data were anonymous.