1. “Golgi Cenci” Foundation, Corso San Martino 10, 20081 Abbiategrasso, Italy
2. “C. Golgi” Geriatric Institute, Piazza Samek 5, 20081 Abbiategrasso, Italy
3. Unit of Biostatistics and Clinical Epidemiology, Department of Public Health, Experimental and Forensic Medicine, University of Pavia, Via Forlanini 2, 27100 Pavia, Italy