Syperek, Annika http://orcid.org/0000-0002-8132-6912
Angermaier, Anselm
Kromrey, Marie-Luise
Hosten, Norbert
Kirsch, Michael
Article History
Received: 17 April 2019
Accepted: 12 July 2019
First Online: 1 August 2019
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: All procedures performed in the studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards.
: Informed consent was waived by the local ethics committee due to the retrospective study design.