1. Unit of Cancer Epidemiology, Città della Salute e della Scienza University-Hospital and Center for Cancer Prevention (CPO), Via Santena 7, 10126 Turin, Italy
2. Centre for Biostatistics, Epidemiology and Public Health (C-BEPH), Department of Clinical and Biological Sciences, University of Turin, 10043 Orbassano, Italy
3. Unit of Cancer Epidemiology, Department of Medical Sciences, University of Turin, 10126 Turin, Italy
4. Institute for Cancer Research, Prevention and Clinical Network (ISPRO), 50139 Florence, Italy
5. Epidemiology and Prevention Unit, Fondazione IRCCS Istituto Nazionale dei Tumori, 20133 Milan, Italy
6. Unit of Epidemiology, Regional Health Service ASL TO3, 10095 Grugliasco, Italy