1. Geriatrics Section; Campus Bio-Medico University; Rome Italy
2. Geriatric Rehabilitation Unit; Azienda Sanitaria di Firenze; Florence Italy
3. UOS Accesso e Presa in Carico Assistenziale; Azienda Sanitaria Locale Roma E; Rome Italy
4. Longitudinal Studies Section, Clinical Research Branch; National Institute on Aging; Baltimore Maryland