[1] Ist Ric Farmacol Mario Negri, Dept Epidemiol, I-20156 Milan, Italy
[2] Univ Milan, Sect Med Stat, Dept Occupat Hlth, Milan, Italy
[3] Natl Tumor Inst, Dept Med Stat Biometry & Bioinformat, Milan, Italy
[4] CHU Vaudois, Inst Social & Prevent Med, Canc Epidemiol Unit, CH-1011 Lausanne, Switzerland
[5] CHU Vaudois, Vaud Canc Registrie, Inst Social & Prevent Med, CH-1011 Lausanne, Switzerland
[6] CHU Vaudois, Neuchatel Canc Registrie, Inst Social & Prevent Med, CH-1011 Lausanne, Switzerland
[7] Univ Lausanne, Lausanne, Switzerland