1. Department of Clinical Sciences Section of Rheumatology Lund University Lund Sweden
2. Department of Periodontics, and the Department of Oral Medicine University of Washington Seattle WA USA
3. Faculty of Health Sciences Kristianstad University Kristianstad Sweden
4. Department of Health Blekinge Institute of Technology Karlskrona Sweden
5. School of Dental Science Trinity College Dublin Ireland
6. Faculty of Dentistry The University of Hong Kong Hong Kong SAR China