1. Department of Internal Medicine and Medical Therapy, Section of Geriatrics, University of Pavia, 27100 Pavia, Italy
2. Agency for Elderly People Services, Hospital Santa Margherita, 27100 Pavia, Italy
3. Ambra Elektron, Associazione Italiana di Biofisica per lo Studio dei Campi Elettromagnetici in Medicina, 00186 Rome, Italy
4. Alberto Sorti Research Institute, Medicine and Metamolecular Biology, 10122 Turin, Italy
5. Department of Public Health, Experimental and Forensic Medicine, Section of Human Nutrition, Endocrinology and Nutrition Unit, University of Pavia, 27100 Pavia, Italy
6. Department of Public Health, Experimental and Forensic Medicine, Biostatistics and Clinical Epidemiology Unit, University of Pavia, 27100 Pavia, Italy