1. Department of Periodontology; Faculty of Odontology; University of Malmö; Malmö Sweden
2. Division of Oral Surgery; School of Dentistry; Medical University of Vienna; Vienna Austria
3. Private Practice; Taiskirchen Austria
4. Postgraduate Course Periodontology; Medical University of Vienna; Vienna Austria
5. Department of Orthodontics and Dentofacial Orthopedics; Dental School/Medical Faculty; University of Bern; Bern Switzerland
6. Division of Periodontology; Department of Dental Medicine; Karolinska Institute; Huddinge Sweden