Institution: | 1. Department of Surgery, Unit of Dentistry and Oral Surgery, University of Pisa, Pisa, Italy;2. European Research Group on Periodontology, Berne, Switzerland;3. Department of Periodontology, School of Dentistry, University “G.D'Annunzio”, Chieti, Italy;4. Department of Oral Surgery, University “Federico II”, Naples, Italy;5. Periodontology Unit, Division of Clinical Research, UCL Eastman Dental Institute, London, UK |