1. Division of Oral Diagnostics and Rehabilitation, Department of Dental Medicine; Karolinska Institutet; Huddinge Sweden
2. Division of Clinical Immunology and Transfusion Medicine, Department of Laboratory Medicine; Karolinska Institutet; Stockholm Sweden
3. Department of Oral and Maxillofacial Surgery; Karolinska University Hospital; Stockholm Sweden
4. Unit of Biostatistics, Institute of Environmental Medicine; Karolinska Institutet; Stockholm Sweden
5. Department of Oral Pathology, Faculty of Odontology; Malmö University; Malmö Sweden