Jaecker, Vera
Zapf, Tabea
Naendrup, Jan-Hendrik
Kanakamedala, Ajay C.
Pfeiffer, Thomas
Shafizadeh, Sven
Article History
Received: 14 September 2017
First Online: 19 May 2018
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: Institutional review board approval was obtained by the ethics committee of Witten/Herdecke University (IRB Number: 09-2015).