[1] Univ Turin, Sez Genet Biochim & Biol, Dept Genet Biochem & Biol, I-10126 Turin, Italy
[2] Azienda Policlin Modena, Dept Endocrinol, Modena, Italy
[3] Azienda Policlin Modena, Dept Endocrinol, Modena, Italy
[4] Ist Nazl Tumori, Dept Pathol & Expt Oncol, I-20133 Milan, Italy