Rasmussen, M M
Kutzenberger, J
Krogh, K
Zepke, F
Bodin, C
Domurath, B
Christensen, P
Article History
Received: 17 June 2014
Revised: 29 December 2014
Accepted: 30 December 2014
First Online: 20 January 2015
Competing interests
: The authors declare no conflict of interest.