Tom (University of Oslo Christensen Norway),Per (University of Bergen Laegreid Norway),Kjell Arne (University of Tromso Rovik Norway)
（2）
Christensen, Tom (University of Oslo, Norway),Laegreid, Per (University of Bergen, Norway)
（1）
Hetland, Per (University of Oslo, Norway),Pierroux, Palmyre (University of Oslo, Norway),Esborg, Line (University of Oslo, Norway)
（1）
