Karlsen, Christian
Ytteborg, Elisabeth
Timmerhaus, Gerrit
Høst, Vibeke
Handeland, Sigurd
Jørgensen, Sven Martin
Krasnov, Aleksei
Article History
Received: 14 March 2018
Accepted: 7 June 2018
First Online: 22 June 2018
Competing Interests
: The authors declare no competing interests.