Affiliation: | 1. Department of Odontology, Umeå University, Umeå, Sweden;2. Department of Molecular Periodontology, Umeå University, Umeå, Sweden Gävle County Hospital, Department of Periodontology, Public Dental Health County Council of Gävleborg, Gävle, Sweden Center for Research and Development Uppsala University/Region Gävleborg, Gävle, Sweden;3. Gävle County Hospital, Department of Periodontology, Public Dental Health County Council of Gävleborg, Gävle, Sweden Center for Research and Development Uppsala University/Region Gävleborg, Gävle, Sweden;4. Department of Molecular Periodontology, Umeå University, Umeå, Sweden |