aThe Ohio State University College of Public Health, Columbus, Ohio, USA
b‘Mario Negri’ Institute for Pharmacological Research
cIstituto DOXA, Gallup International Association
d‘G.A. Maccacaro’ Institute of Medical Statistics and Biometry of the University of Milan, Milan
eDepartment of Therapeutic Research and Medicines Evaluation, Italian National Institute of Health, Rome, Italy
Correspondence to Professor Carlo La Vecchia, MD, Istituto di Ricerche Farmacologiche ‘Mario Negri’, Via Giuseppe La Masa, 19-20156 Milan, Italy
Tel: +39 0239 014527; fax: +39 0233 200231; e-mail: [email protected]
Institution where work was performed: Istituto di Ricerche Farmacologiche ‘Mario Negri’, Milan, Italy.
Received 24 April 2008 Accepted 2 June 2008