1. Geriatric Endocrine Unit; Department Clinical and Experimental Medicine; University Hospital of Parma; Parma Italy
2. Geriatric Unit; University Hospital of Parma; Parma Italy
3. Geriatric Unit; ASF Toscana; Firenze Italy
4. Laboratory of Epidemiology, Demography, and Biometry; National Institute on Aging; Baltimore Maryland
5. National Institute on Aging; Baltimore Maryland