Heggland, Erna Irene
Eichner, Christiane
Støve, Svein Isungset
Martinez, Aurora
Nilsen, Frank
Dondrup, Michael
Funding for this research was provided by:
Norges Forskningsråd (203513/O30, 203513/O30, 203513/O30, 203513/O30)
Article History
Received: 19 March 2018
Accepted: 19 February 2019
First Online: 12 March 2019
Competing Interests
: The authors declare no competing interests.