Kröger, N
Bornhäuser, M
Stelljes, M
Pichlmeier, U
Trenschel, R
Schmid, C
Arnold, R
Martin, H
Heinzelmann, M
Wolschke, C
Meyer, R G
Bethge, W
Kobbe, G
Ayuk, F
Gökbuget, N
Hölzer, D
Zander, A
Beelen, D
Article History
Received: 15 January 2015
Revised: 26 June 2015
Accepted: 2 July 2015
First Online: 14 September 2015
Competing interests
: NK received research funding from Medac/Germany. The remaining authors declare no conflict of interest.