Hennig, D
Müller, S
Wichmann, C
Drube, S
Pietschmann, K
Pelzl, L
Grez, M
Bug, G
Heinzel, T
Krämer, O H
Article History
Received: 30 July 2014
Revised: 9 October 2014
Accepted: 23 October 2014
First Online: 16 December 2014
Competing interests
: Gesine Bug has received honoraria and travel grants from Novartis Pharma GmbH and from Celgene GmbH.