1. Trauma Care Foundation Cambodia , Kamakor, Battambang , Cambodia
2. Department of Pain , University Hospital of North Norway , Tromso , Norway
3. Institute of Clinical Medicine , University of Tromso – The Arctic University of Norway , Tromso , Norway
4. Trauma Care Foundation Norway, Banak Leir , N-9700 Lakselv , Norway , Phone: +351 911 086 502