1. Hospital Orton, Helsinki, Finland
2. Department of Pharmacology, Faculty of Medicine, University of Helsinki, Helsinki, Finland
3. Department of Oral and Maxillofacial Diseases, University of Helsinki, and Helsinki University Central Hospital, Helsinki, Finland
4. Salarusta Ltd, Espoo, Finland
5. Division of Periodontology, Department of Dental Medicine, Karolinska Institutet, Huddinge, Sweden