[1] Univ Bergen, Bergen, Norway
[2] Haukeland Hosp, N-5021 Bergen, Norway
[3] Edinger Inst, Frankfurt, Germany
[4] UniResearch AS, Bergen, Norway
[5] Ctr Rech Publ Sante, Luxembourg, Luxembourg
[6] Univ Calif Davis, Ctr Comprehens Canc, Sacramento, CA USA
[7] Univ Calif Davis, Davis, CA USA