Pedersen, Ken Steen
Johansen, Markku
Angen, Øystein
Jorsal, Sven Erik
Nielsen, Jens Peter
Jensen, Tim K
Guedes, Roberto
Ståhl, Marie
Bækbo, Poul
Article History
Received: 1 April 2014
Accepted: 8 October 2014
First Online: 1 November 2014