Duewell, P
Steger, A
Lohr, H
Bourhis, H
Hoelz, H
Kirchleitner, S V
Stieg, M R
Grassmann, S
Kobold, S
Siveke, J T
Endres, S
Schnurr, M
Article History
Received: 15 November 2013
Revised: 6 May 2014
Accepted: 5 June 2014
First Online: 11 July 2014
Change Date: 10 November 2014
Change Type: Correction
Change Details: This article has been corrected since Online Publication and a corrigendum appears in this issue.
Competing interests
: The authors declare no conflict of interest.
Free to read: This content has been made available to all.