1. Department of Preventive and Predictive Medicine, Unit of Analytical Epidemiology, Fondazione IRCCS Istituto Nazionale dei Tumori, Milan, Italy;
2. Department of Cancer Epidemiology, National Centre for Epidemiology, Surveillance and Health Promotion, Istituto Superiore di Sanità, Rome, Italy;
3. Amsterdam Cancer Registry, Amsterdam; The Netherlands;
4. Girona Cancer Registry, Girona, Spain;
5. Côte D'Or Cancer Registry of Haematological Malignancies, University of Burgundy, Dijon, France;
6. Geneva Cancer Registry, Geneva, Switzerland; and
7. Department of Preventive and Predictive Medicine, Unit of Etiological Epidemiology and Prevention, Fondazione IRCCS Istituto Nazionale dei Tumori, Milan, Italy