Kilvaer, Thomas K
Paulsen, Erna-Elise
Khanehkenari, Mehrdad R
Al-Saad, Samer
Johansen, Ramona M
Al-Shibli, Khalid
Bremnes, Roy M
Busund, Lill-Tove
Donnem, Tom
Article History
Received: 25 November 2015
Revised: 4 March 2016
Accepted: 11 March 2016
First Online: 7 April 2016
Competing interests
: The authors declare no conflict of interest.