Licaj, Idlir
Jacobsen, Bjarne Koster
Selmer, Randi Marie
Maskarinec, Gertraud
Weiderpass, Elisabete
Gram, Inger Torhild
Article History
Revised: 19 October 2016
Accepted: 18 November 2016
First Online: 13 December 2016
Competing interests
: The authors declare no conflict of interest.