| Affiliation: | 1. Department of Oral Sciences, Kristianstad University, , Kristianstad, Sweden;2. School of Dental Sciences, Trinity College, , Dublin, Ireland;3. Blekinge Institute of Technology, , Karlskrona, Sweden;4. Uppsala K?kkirurgiska Centrum, , Uppsala, Sweden;5. Department of Periodontology, Maxillofacial Unit, Hospital of Halland, , Halmstad, Sweden;6. Departments of Periodontics and Oral Medicine, University of Washington, , Seattle, WA, USA;7. Department of Periodontology, University of Bern, , Bern, Switzerland |
