1. Department of Oral and Maxillofacial Diseases University of Helsinki and Helsinki University Hospital HelsinkiFinland
2. Institute of Dentistry University of Eastern Finland and Kuopio University Hospital, Oral and Maxillofacial Diseases Kuopio Finland
3. Division of Periodontology Department of Dental Medicine Division of Oral Diseases Karolinska Institutet Huddinge Sweden
4. Research Unit of Biomedicine Medical Microbiology and Immunology Faculty of Medicine University of Oulu OuluFinland
5. Medical Research Center and Nordlab Oulu University Hospital and University of Oulu OuluFinland
6. Heart and Lung Center Helsinki University Hospital and Helsinki University Helsinki Finland