Jørgensen, Agnete
Fagerheim, Toril
Rand-Hendriksen, Svend
Lunde, Per I
Vorren, Torgrim O
Pepin, Melanie G
Leistritz, Dru F
Byers, Peter H
Article History
Received: 28 February 2014
Revised: 6 August 2014
Accepted: 7 August 2014
First Online: 10 September 2014
Competing interests
: The authors declare no conflict of interest.