Voigt, Karsten
Sharma, Cynthia M
Mitschke, Jan
Lambrecht, S Joke
Voß, Björn
Hess, Wolfgang R
Steglich, Claudia
Article History
Received: 10 December 2013
Revised: 3 March 2014
Accepted: 5 March 2014
First Online: 17 April 2014
Competing interests
: The authors declare no conflict of interest.