1. Department of Neurosciences, Psychology, Drug Research and Child Health, Section of Pharmacology and Toxicology, University of Florence, Florence, Italy;
2. Health Search, Italian College of General Practitioners and Primary Care, Florence, Italy;
3. Institute of Gerontology and Geriatrics, Department of Medicine, University of Perugia, Perugia, Italy;
4. Italian College of General Practitioners and Primary Care, Florence, Italy