Gordt, Katharina
Mikolaizak, A. Stefanie
Nerz, Corinna
Barz, Carolin
Gerhardy, Thomas
Weber, Michaela
Becker, Clemens
Schwenk, Michael
Article History
Received: 27 October 2017
Revised: 5 January 2018
Accepted: 18 January 2018
First Online: 12 February 2018
Compliance with ethical guidelines
:
: K. Gordt, S. Mikolaizak, C. Nerz, C. Barz, T. Gerhardy, M. Weber, C. Becker and M. Schwenk declare that they have no competing interests.
: Ethical approval was obtained from the local institutional review board of each research centre and is in agreement with the Declaration of Helsinki. All study participants provided written informed consent prior to participation.