| Affiliation: | Specialist in periodontics, Department of Periodontology and Oral Implantology, Faculty of Medicine and Health Sciences, Dental School, University of Ghent, Belgium;;specialist in periodontics and professor, Department of Periodontology, Division of Oral Microbiology, School of Dental Medicine, University of Berne, Berne, Switzerland, and the University of Washington, Seattle WA, USA;;professor, Örebro University, School of Health and Medical Sciences, 701 82 Örebro, Sweden;;specialist in periodontics and professor, Department of Periodontology and Oral Implantology, Faculty of Medicine and Health Sciences, Dental School, University of Ghent, Belgium;;associate professor Department of Periodontology, School of Dentistry, MalmöUniversity, Malmö, Sweden |
