1.Department of Rheumatology and Clinical Immunology, Faculty of Medicine, School of Health Sciences, University of Thessaly, Larissa, Greece
2.Department of Medicine, School of Health Sciences, Aristotle University of Thessaloniki, Thessaloniki, Greece
Xenophon Theodoridis, Stefanos Pittas, Dimitrios P. Bogdanos, Maria G. Grammatikopoulou