1. Public Health Department, AST Ancona, Ancona, Italy
2. Department of Biomedical Sciences and Public Health, Section of Hygiene, Preventive Medicine and Public Health, Polytechnic University of the Marche Region, Ancona, Italy
3. Geriatricin Ambulatory Specialist - AST Ancona,Ancona, Italy
4. Department of Health Promotion Sciences, Maternal and Infant Care, Internal Medicine and Medical Specialties (PROMISE) “G. D’Alessandro”, University of Palermo, Palermo, Italy
5. Public Health Department, AST Ascoli Piceno, Ascoli Piceno, Italy
6. Department of Geriatrics and Orthopaedics, Università Cattolica del Sacro Cuore, Rome, Italy
7. Department of Health Sciences, University of Genoa, Genoa, Italy
8. General Directorate for Health Prevention, Ministry of Health, Ministero della Salute, Rome, Italy
9. UOC Vaccinations, Department of Prevention, Local Health Authority Roma1, Rome, Italy
10. Aging Research Center, Department of Neurobiology, Care Sciences and Society, Karolinska Institutet, Stockholm, Sweden
11. Stockholm Gerontology Research Centre, Stockholm, Sweden