Huber, F
Montani, M
Sulser, T
Jaggi, R
Wild, P
Moch, H
Gevensleben, H
Schmid, M
Wyder, S
Kristiansen, G
Article History
Received: 4 August 2014
Revised: 17 October 2014
Accepted: 25 October 2014
First Online: 25 November 2014
Change Date: 6 January 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