Exner, Ruth
Pulverer, Walter
Diem, Martina
Spaller, Lisa
Woltering, Laura
Schreiber, Martin
Wolf, Brigitte
Sonntagbauer, Markus
Schröder, Fabian
Stift, Judith
Wrba, Fritz
Bergmann, Michael
Weinhäusel, Andreas
Egger, Gerda
Article History
Received: 28 March 2015
Revised: 17 June 2015
Accepted: 30 July 2015
First Online: 3 September 2015
Change Date: 29 September 2015
Change Type: Update
Change Details: This paper was modified 12 months after initial publication to switch to Creative Commons licence terms, as noted at publication
Competing interests
: The authors declare no conflict of interest.