Hammer, Stephan C http://orcid.org/0000-0002-3620-9362
Marjanovic, Antonija
Dominicus, Jörg M
Nestl, Bettina M
Hauer, Bernhard
Article History
Received: 8 March 2014
Accepted: 8 October 2014
First Online: 15 December 2014
Competing interests
: The authors declare no competing financial interests.