[1] Univ Bologna, Dept Expt Pathol, I-40126 Bologna, Italy
[2] Univ Bologna, Dept Stat Sci, I-40126 Bologna, Italy
[3] Italian Natl Res Ctr Aging, Ancona, Italy
[4] Italian Natl Res Ctr Aging, Florence, Italy
[5] Univ Milan, Maggiore Hosp, IRCCS, Inst Internal Med, Milan, Italy
[6] Univ Sassari, Inst Clin Biochem, I-07100 Sassari, Italy
[7] Univ Sassari, Chair Geriatr & Gerontol, I-07100 Sassari, Italy
[8] Univ Reggio Calabria, Chair Geriatr, Catanzaro, Italy
[9] Univ Parma, Inst Internal Med & Med Therapy, I-43100 Parma, Italy
[10] Univ Calabria, Dept Cell Biol, I-87036 Rende, Italy
[11] Univ Modena, Dept Biomed Sci, I-41100 Modena, Italy
[12] Univ La Sapienza, Dept Expt Med, Genet Sect, Rome, Italy
[13] Univ Florence, Dept Neurol & Psychiat Sci, Florence, Italy
[14] Univ Florence, Inst Gen Pathol, Florence, Italy