Bergink, V
Larsen, J T
Hillegers, M H J
Dahl, S K
Stevens, H
Mortensen, P B
Petersen, L
Munk-Olsen, T
Article History
Received: 25 April 2016
Revised: 12 July 2016
Accepted: 22 August 2016
First Online: 25 October 2016
Competing interests
: The authors declare no conflict of interest.