1. Department of Medicine and Surgery, University of Perugia, Perugia, Italy
2. Department of General Practice, Local Health Unit Toscana Centro, Florence, Italy
3. Department of Cardiac, Thoracic, Vascular Sciences and Public Health, University of Padua, Padua, Italy
4. Department of Health Sciences, University of Florence, Florence, Italy
5. Prevention Department, Local Health Authority of Taranto, Taranto, Italy
6. Prevention Department, Hygiene and Public Health Service, Local Health Unit, Lecce, Italy
7. Coordinator Working Group “Vaccines and Immunization Policies”, Italian Scientific Society of Hygiene, Preventive Medicine and Public Health (SItI), Cogorno (Ge), Italy
8. Vaccination strategies group, Lazio region, Italy
9. Department of Geriatrics and Orthopedics, Fondazione Policlinico Universitario “A. Gemelli”, IRCCS, Università Cattolica del Sacro Cuore, Rome, Italy
10. Department of Internal Medicine, Università Cattolica del Sacro Cuore, Rome, Italy
11. Department of Health Sciences, University of Genoa, Genoa, Italy
12. Hygiene Unit, San Martino Policlinico Hospital – IRCCS for Oncology and Neurosciences, Genoa, Italy
13. Department of Translational Research and New Technologies in Medicine and Surgery, University of Pisa, Pisa, Italy
14. Italian College of General Practitioners and Primary Care, Florence, Italy
15. Pediatric Unit, Bambino Gesù Children’s Hospital, IRCCS, Rome, Italy
16. System Medicine Department, Tor Vergata University of Rome, Rome, Italy
17. Department of Health Promotion, Maternal and Infant Care, Internal Medicine and Medical Specialties (PROMISE), University of Palermo, Palermo, Italy