[1] Canc Registry Norway, Oslo, Norway
[2] Imperial Coll London, London, England
[3] Karolinska Inst, Stockholm, Sweden
[4] Haukeland Hosp, Bergen, Norway
[5] Helse More & Romsdal HF, Alesund, Norway
[6] Stavanger Univ Hosp, Stavanger, Norway
[7] London Sch Hyg & Trop Med, London, England