[1] Stockholm Ctr Publ Hlth, Div Epidemiol, S-17176 Stockholm, Sweden
[2] Karolinska Inst, Inst Environm Med, Dept Epidemiol, S-10401 Stockholm, Sweden
[3] AstraZeneca R&D, Sodertalje, Sweden
[4] Karolinska Inst, Dept Mol Med, Stockholm, Sweden
[5] Norwegian Univ Sci & Technol, Inst Canc Res & Mol Med, N-7034 Trondheim, Norway