Pedersen, T A L
Pedersen, E B
Munk, K
Hjortdal, V E
Emmertsen, K
Andersen, N H
Article History
Received: 11 March 2014
Revised: 10 June 2014
Accepted: 16 June 2014
First Online: 28 August 2014
Competing interests
: The authors declare no conflict of interest.