Dudele, A
Hougaard, K S
Kjølby, M
Hokland, M
Winther, G
Elfving, B
Wegener, G
Nielsen, A L
Larsen, A
Nøhr, M K
Pedersen, S B
Wang, T
Lund, S
Article History
Received: 22 November 2016
Revised: 24 April 2017
Accepted: 25 May 2017
First Online: 7 June 2017
Competing interests
: The authors declare no conflict of interest.