Lüddecke, S
Ertych, N
Stenzinger, A
Weichert, W
Beissbarth, T
Dyczkowski, J
Gaedcke, J
Valerius, O
Braus, G H
Kschischo, M
Bastians, H
Article History
Received: 16 February 2015
Revised: 15 June 2015
Accepted: 6 July 2015
First Online: 24 August 2015
Competing interests
: The authors declare no conflict of interest.