Rasmussen, M M
Krogh, K
Clemmensen, D
Tankisi, H
Fuglsang-Frederiksen, A
Rawashdeh, Y
Bluhme, H
Christensen, P
Article History
Received: 4 January 2015
Revised: 28 March 2015
Accepted: 1 April 2015
First Online: 28 April 2015
Competing interests
: The authors declare no conflict of interest.