Geismann, C
Grohmann, F
Sebens, S
Wirths, G
Dreher, A
Häsler, R
Rosenstiel, P
Hauser, C
Egberts, J-H
Trauzold, A
Schneider, G
Sipos, B
Zeissig, S
Schreiber, S
Schäfer, H
Arlt, A
Article History
Received: 4 March 2014
Revised: 21 July 2014
Accepted: 1 September 2014
First Online: 9 October 2014
Competing interests
: The authors declare no conflict of interest.