Walter, M
Bentz, D
Schicktanz, N
Milnik, A http://orcid.org/0000-0002-3933-3289
Aerni, A
Gerhards, C
Schwegler, K
Vogel, M
Blum, J
Schmid, O
Roozendaal, B
Lang, U E
Borgwardt, S
de Quervain, D
Article History
Received: 25 January 2015
Revised: 24 April 2015
Accepted: 21 May 2015
First Online: 28 July 2015
Competing interests
: The authors declare no conflict of interest.