1. Accademia Toscana di Ricerca Odontostomatologica (ATRO) Florence Italy
2. European Research Group on Periodontology (ERGOPERIO) Genova Italy
3. Private Practice Florence Italy
4. Department of Oral Health Sciences KU Leuven and Dentistry (Periodontology), University Hospitals Leuven Leuven Belgium
5. Private Practice The Hague The Netherlands
6. Shanghai PerioImplant Innovation Center, Department of Oral and Maxillofacial Implantology, Shanghai Ninth People Hospital, Shanghai Jiao Tong University School of Medicine, National Clinical Research Center of Oral Diseases, National Center of Stomatology, College of Stomatology Shanghai Jiao Tong University Shanghai China