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Authors
Kjersem, J B
Thomsen, M
Guren, T
Hamfjord, J
Carlsson, G
Gustavsson, B
Ikdahl, T
Indrebø, G
Pfeiffer, P
Lingjærde, O
Tveit, K M
Wettergren, Y
Kure, E H
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Article History
Received: 7 January 2015
Revised: 9 May 2015
Accepted: 1 June 2015
First Online: 11 August 2015
Competing interests
: The authors declare no conflict of interest.
