Köhnke, T
Sauter, D
Ringel, K
Hoster, E
Laubender, R P
Hubmann, M
Bohlander, S K
Kakadia, P M
Schneider, S
Dufour, A
Sauerland, M-C
Berdel, W E
Büchner, T
Wörmann, B
Braess, J
Hiddemann, W
Spiekermann, K
Subklewe, M
Article History
Received: 8 January 2014
Revised: 11 May 2014
Accepted: 27 May 2014
First Online: 10 June 2014
Competing interests
: The authors declare no conflict of interest.