Wimmer, Theresa
Ortmann, Olaf
Gerken, Michael http://orcid.org/0000-0001-8610-9303
Klinkhammer-Schalke, Monika
Koelbl, Oliver
Inwald, Elisabeth C.
Article History
Received: 17 August 2018
Accepted: 14 December 2018
First Online: 4 January 2019
Compliance with ethical standards
:
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. For this retrospective type of study formal consent is not required.
: The authors declare that they have no conflict of interest.
: This article is a retrospective study and does not contain any studies with human participants or animals performed by any of the authors.