1. Department of Hygiene, Institute of Public Health, Università Cattolica del Sacro Cuore, Rome, Italy
2. Department of Health Promotion, Institute of Public Health, Faculty of Health Sciences, Jagiellonian University Medical College, Krakow, Poland
3. Department of Internal Medicine and Geriatrics, Università Cattolica del Sacro Cuore, Rome, Italy
4. National Institute of Health, Rome, Italy