Kordes, M
Röring, M
Heining, C
Braun, S
Hutter, B
Richter, D
Geörg, C
Scholl, C
Gröschel, S
Roth, W
Rosenwald, A
Geissinger, E
von Kalle, C
Jäger, D
Brors, B
Weichert, W
Grüllich, C
Glimm, H
Brummer, T
Fröhling, S
Article History
Received: 17 October 2015
Revised: 22 October 2015
Accepted: 26 October 2015
First Online: 19 November 2015
Competing interests
: The authors declare no conflict of interest.