[1] Univ Pisa, Dept Clin & Expt Med, Pisa, Italy
[2] CNR, Inst Clin Physiol, Natl Res Council, Unit epidemiol & Biostat, I-56100 Pisa, Italy
[3] G Monasterio Fdn, Pisa, Italy
[4] CNR, Inst Clin Physiol, Natl Res Council, I-56100 Pisa, Italy
[5] Univ Roma La Sapienza, Dept Expt Med, I-00185 Rome, Italy
[6] IRCCS San Raffaele Pisana, Dept Cellular & Mol Pathol, Rome, Italy
[7] Mt Sinai Sch Med, Div Endocrinol Diabet & Bone Dis, New York, NY USA