1. Immunosenescence Unit, Department of Pathobiology and Medical and Forensic Biotechnologies, University of Palermo, Palermo, Italy.
2. Department of Health Sciences, University of Molise, Campobasso, Italy.
3. Laboratory of Epidemiology and Psychology of Aging and Dementia, Department of Clinical Neuroscience, University of Palermo, Palermo, Italy.
4. General Practitioner, Palermo, Italy.