1. Department of Periodontics and Oral Medicine University of Michigan Ann Arbor Michigan USA
2. Private Practice Budapest Hungary
3. ETEP (Etiology and Therapy of Periodontal and Peri‐Implant Diseases) Research Group University Complutense Madrid Spain
4. Section of Postgraduate Periodontology University Complutense Madrid Spain
5. Department of Periodontology Universitat Internacional de Catalunya Barcelona Spain
6. Unit of Oral Surgery, Department of Biomedical, Surgical, and Dental Sciences, A.O. Santi Paolo & Carlo, Dental Clinic University of Milan Milan Italy