Tomschi, Fabian
Köster, Paulina
Predel, Hans-Georg
Lay, Daniel
Bloch, Wilhelm
Grau, Marijke
Article History
Received: 4 December 2017
Accepted: 26 February 2018
First Online: 13 March 2018
Compliance with ethical standards
:
: The authors declare that they have no conflicts of interest.
: The used protocols in this study were approved by the ethics committee of the German Sport University Cologne. These protocols align with the Declaration of Helsinki of 1964.
: All participants gave written informed consent to participate in this study.