Lange, Tobias
Thomas, Andreas
Walpurgis, Katja
Thevis, Mario
Funding for this research was provided by:
World Anti-Doping Agency (#17A12MT)
Federal Ministry of the Interior, Building and Community
Anti-Doping Switzerland
National Anti-Doping Agency Germany
Article History
Received: 10 December 2019
Revised: 26 March 2020
Accepted: 31 March 2020
First Online: 16 April 2020
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. Ethical approval was obtained from the local ethics committee of the German Sport University Cologne (#022/2017) and informed consent was provided by all participants included in the study.
: The authors declare that they have no conflict of interest.