[1] Ist Nazl Studio & Cura Tumori, Epidemiol Unit, I-20133 Milan, Italy
[2] Inst Expt & Clin Med, Tallinn, Estonia
[3] Estonian Canc Registry, Tallinn, Estonia
[4] M Sklodowska Curie Canc Ctr, Warsaw, Poland
[5] Inst Oncol, Warsaw, Poland
[6] Registry Haematol Malignancies Cote Or, Dijon, France
[7] Cote Or Canc Registry, Dijon, France
[8] Tarn Canc Registry, Dijon, France
[9] Canc Registry Bas Rhin, Strasbourg, France
[10] Thames Canc Registry, London, England
[11] Swedish Canc Registry, Lund, Sweden
[12] Ist Super Sanita, I-00161 Rome, Italy