1. Department of Clinical and Experimental Medicine University of Foggia Foggia Italy
2. Periodontology Unit, Centre for Host‐Microbiome Interactions, Faculty of Dentistry, Oral and Craniofacial Sciences King's College London London UK
3. Department of Periodontology, Center for Dentistry and Oral Medicine (Carolinum) Johann Wolfgang Goethe‐University Frankfurt/Main Frankfurt am Main Germany
4. Department of Periodontics and Oral Medicine University of Michigan School of Dentistry Ann Arbor Michigan USA
5. Department of Periodontology, National Engineering Laboratory for Digital and Material Technology of Stomatology, Beijing Key Laboratory of Digital Stomatology Peking University School and Hospital of Stomatology Beijing China
6. Department of Periodontics and Oral Medicine University of Pittsburgh Pittsburgh Pennsylvania USA