1. Department of Rheumatology and Clinical Immunology, Faculty of Medicine, School of Health Sciences, University of Thessaly, Biopolis, Larissa, Greece
2. Medical School, Faculty of Health Sciences, Aristotle University of Thessaloniki, Thessaloniki, Greece
3. Laboratory of Histology and Embryology, Medical School, Faculty of Health Sciences, Aristotle University of Thessaloniki, Thessaloniki, Greece
4. Department of Medicine and Research Laboratory of Internal Medicine, University Hospital of Larissa, Biopolis, Larissa, Greece
5. Division of Transplantation, Immunology and Mucosal Biology, MRC Centre for Transplantation, King’s College London Medical School, London, UK