Pauly, F
Fjordén, K
Leppä, S
Holte, H
Björkholm, M
Fluge, Ø
Møller Pedersen, L
Eriksson, M
Isinger-Ekstrand, A
Borrebaeck, C A K
Jerkeman, M
Wingren, C
Article History
First Online: 18 November 2016
Competing interests
: The authors declare no conflict of interest.