Adamczyk, M
Ambrosius, U
Lietzenmaier, S
Wichniak, A
Holsboer, F
Friess, E
Article History
Received: 1 April 2014
Revised: 31 March 2015
Accepted: 12 April 2015
First Online: 7 July 2015
Competing interests
: The authors declare no conflict of interest.