Hansen, S
Halldorsson, T I
Olsen, S F
Rytter, D
Bech, B H
Granström, C
Henriksen, T B
Chavarro, J E
Article History
Received: 24 November 2016
Revised: 15 May 2017
Accepted: 21 June 2017
First Online: 31 July 2017
Competing interests
: The authors declare no conflict of interest.