1. Department of Rheumatology and Clinical Immunology, Faculty of Medicine, School of Health Sciences, University of Thessaly, Larissa, Greece;
2. Biomedical Section, Institute of Research and Technology Thessaly, Centre for Research and Technology Hellas (CERTH), Larissa, Greece;
3. Institute of Immunology affiliated to Euroimmun AG, Lübeck, Germany;
4. Division of Transplantation, Immunology and Mucosal Biology, MRC Centre for Transplantation, King's College London Medical School, London, UK;
5. Center for Molecular Medicine, Old Dominion University, Norfolk, VA, USA