Balbi, J C1; Larrinaga, M T1,2; De Stefani, E2; Mendilaharsu, M2; Ronco, A L2; Boffetta, P3; Brennan, P3
1 Sección de Epidemiologı´a, Instituto Nacional de Oncologı´a, Montevideo, Uruguay. 2 Registro Nacional de Cáncer, Ministerio de Salud Pública, Avda. Brasil 3080 dep. 402, Montevideo, Uruguay. 3 Unit of Environmental Cancer Epidemiology, International Agency for Research on Cancer, Lyon, France.
Correspondence to: E De Stefani.
Received 9 May 2001
Accepted 5 June 2001