1 Department of Biomaterials, Institute of Clinical Sciences, The Sahlgrenska Academy at University of Gothenburg, Göteborg, Sweden.
2 Department of Oral Biochemistry, Institute of Odontology, The Sahlgrenska Academy at University of Gothenburg, Göteborg, Sweden.
3 Department of Periodontology, School of Dentistry and Dental Research Institute, Seoul National University and Seoul National University Dental Hospital, Seoul, South Korea.
4 Department of Periodontology, Institute of Odontology, The Sahlgrenska Academy at University of Gothenburg, Göteborg, Sweden.