Prell, Tino
Dirks, Meike
Arvanitis, Dimitrios
Braun, David
Peschel, Thomas
Worthmann, Hans
Schuppner, Ramona
Raab, Peter
Grosskreutz, Julian
Weissenborn, Karin
Article History
Received: 16 May 2018
Revised: 1 September 2018
Accepted: 20 November 2018
First Online: 4 January 2019
Compliance with ethical standards
: The study was approved by the local ethics committee and all participants gave written informed consent. The study protocol conforms to the ethical guidelines of the 1975 Declaration of Helsinki.
: The authors declare that they have no conflict of interest.