Wilker, S
Pfeiffer, A
Kolassa, S
Elbert, T
Lingenfelder, B
Ovuga, E
Papassotiropoulos, A
de Quervain, D
Kolassa, I-T http://orcid.org/0000-0001-7847-1847
Article History
Received: 13 March 2014
Revised: 29 April 2014
Accepted: 22 May 2014
First Online: 24 June 2014
Competing interests
: The authors declare no conflict of interest.