1Registre vaudois des tumeurs, Institut universitaire de médecine sociale et préventive, Centre Hospitalier Universitaire Vaudois (CHUV), Chemin des Falaises 1, Lausanne, 1011, Switzerland
2Unité d’épidémiologie du cancer, Institut universitaire de médecine sociale et préventive, rue du Bugnon 17, Lausanne, 1005, Switzerland
3Anatomia Patologica 2, Spedali Civili, Piazza Spedali Civili 1, Brescia, 25124, Italy
4Istituto di Ricerche Farmacologiche ‘Mario Negri’, Via Eritrea 62, Milano, 20157, Italy
5Istituto di Statistica Medica e Biometria, Università degli Studi di Milano, Via Venezian 1, Milano, 20133, Italy
Copyright © 2000 Cancer Research Campaign
This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material.If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit https://creativecommons.org/licenses/by/4.0/.