[1] Univ Modena & Reggio Emilia, Dept Haematol & Oncol, Modena, Italy
[2] Univ Modena & Reggio Emilia, Dept Pathol, Modena, Italy
[3] Univ Modena & Reggio Emilia, Div Dermatol, Dept Internal Med, Modena, Italy
[4] NCI, Genet Epidemiol Branch, Div Canc Epidemiol & Genet, NIH,DHHS, Bethesda, MD 20892 USA