aDepartment of Statistics, Unit of Biostatistics and Epidemiology, University of Milano-Bicocca, Milan, Italy
bDepartment of Pharmacology, University of Bologna, Bologna, Italy
cCentre for Cancer Prevention (CPO), Region Piemonte, Turin, Italy
dOperative Unit of Territorial Health Services, Region Lombardia, Milan, Italy
eResearch Center on Chronic Degenerative Diseases, University of Milan-Bicocca, Milan, Italy
fDepartment of Medicine, Prevention and Health Biotechnology, University of Milano-Bicocca, Milan, Italy
Received 12 July, 2007
Revised 16 November, 2007
Accepted 29 November, 2007
Correspondence to Professor Giovanni Corrao. Dipartimento di Statistica. Unità di Biostatistica ed Epidemiologia, Università degli Studi di Milano-Bicocca. Via Bicocca degli Arcimboldi, 8, Edificio U7, 20126 Milano, Italy Tel: +39 02 64485854; fax: +39 02 64485899; e-mail: [email protected]