Maueröder, C
Chaurio, R A
Dumych, T
Podolska, M
Lootsik, M D
Culemann, S
Friedrich, R P
Bilyy, R http://orcid.org/0000-0002-2344-1349
Alexiou, C
Schett, G
Berens, C
Herrmann, M
Munoz, L E
Article History
Received: 30 October 2015
Revised: 25 December 2015
Accepted: 29 December 2015
First Online: 4 March 2016
Competing interests
: The authors declare no conflict of interest.