Skjoldager, Nicklas
Blanner Bang, Maria
Rykær, Martin
Björnberg, Olof
Davies, Michael J.
Svensson, Birte
Harris, Pernille
Hägglund, Per
Article History
Received: 20 January 2017
Accepted: 13 March 2017
First Online: 11 April 2017
Competing interests
: The authors declare no competing financial interests.