Senft, D
Weber, A
Saathoff, F
Berking, C
Heppt, M V
Kammerbauer, C
Rothenfusser, S
Kellner, S
Kurgyis, Z
Besch, R
Häcker, G
Article History
Received: 11 September 2015
Revised: 8 October 2015
Accepted: 22 October 2015
First Online: 26 November 2015
Competing interests
: The authors declare no conflict of interest.