Affiliation: | 1. Section 2. of Periodontics, Department of Dentistry and Maxillofacial Surgery, Sapienza University of Rome, Rome, Italy;3. Research Centre for the Study of Periodontal and Peri‐Implant Diseases, University of Ferrara, Ferrara, Italy;4. Operative Unit of Dentistry, University‐Hospital of Ferrara, Ferrara, Italy;5. Department of Infectious Disease Epidemiology, Faculty of Epidemiology and Population Health, London School of Hygiene and Tropical Medicine, London, UK |