[1] Univ Parma, Sect Geriatr, Dept Internal & Biomed Sci, I-43100 Parma, Italy
[2] Univ Colorado, Div Geriatr Med, Denver, CO 80202 USA
[3] NIA, Longitud Studies Sect, Clin Res Branch, Baltimore, MD 21224 USA
[4] Univ Parma, Geriatr Rehabil Dept, Azienda Osped, I-43100 Parma, Italy
[5] AUSL 10, Geriatr Unit, Florence, Italy