Paul, Christoph http://orcid.org/0000-0002-6458-0302
Krug, P.
Müller, H. H.
Wachtlin, J.
Mennel, S.
Müller, S.
Schmitz-Valckenberg, S.
Bertelmann, T.
Schumann, R. G.
Article History
Received: 21 December 2017
Revised: 17 June 2018
Accepted: 21 June 2018
First Online: 28 June 2018
Compliance with ethical standards
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee (ethics committee of the medical department, Philipps-University Marburg, Germany) and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. For this type of study formal consent is not required. This article does not contain any studies with animals performed by any of the authors.
: The authors declare that they have no conflict of interest.