1Cancer Epidemiology Unit and Cancer Registries of Vaud and Neuchâtel Institut Universitaire e Médecine Sociale et Preventive, CHUV-Falaises 1, 1011 Lausanne, Switzerland 2Laboratory of Epidemiology, Istituto di Ricerche Farmacologiche ‘Mario Negri’, Via Eritrea 62, 20157 Milano, Italy 3Istituto di Statistica Medica e Biometria Università degli Studi di Milano, Via Venezian 1, 20133 Milano, Italy Correspondence to: F Levi. Fax: (+41) 21 323 0303 E-mail: [email protected]
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Levi et al. (2002) studied this question.
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