1. Department of Rheumatology and Clinical Immunology; Faculty of Medicine; School of Health Sciences; University of Thessaly; Larissa Greece
2. School of Medicine; Faculty of Health Sciences; Aristotle University of Thessaloniki; Thessaloniki Greece
3. Department of Nutritional Sciences & Dietetics; International Hellenic University; Thessaloniki Greece
4. Department of Gastroenterology; Faculty of Medicine; School of Health Sciences; University of Thessaly; Larissa Greece
5. Division of Transplantation Immunology and Mucosal Biology; MRC Centre for Transplantation; King's College London Medical School; London United Kingdom