Koenen, P. http://orcid.org/0000-0001-8346-3462
Shafizadeh, S.
Pfeiffer, T. R.
Wafaisade, A.
Bouillon, B.
Kanakamedala, A. C.
Jaecker, V.
Article History
Received: 5 September 2017
Accepted: 4 May 2018
First Online: 11 May 2018
Compliance with ethical standards
:
: All authors declare that there is no conflict of interests.
: Ethical approval was obtained from the ethics committee of the University of Witten/Herdecke, Germany (ID 146/2014). All procedures involving human participants were in accordance with the 1964 Helsinki declaration and its later amendments.
: Informed consent was obtained from all participants.