1. 3rd Department of Medicine, Institute for Medicine, Medical and Health Science Center, University of Debrecen, Móricz Zs. krt. 22, Debrecen 4032, Hungary
2. Division of Clinical Immunology and Rheumatology, National Institute for Rheumatology and Physiotherapy, Frankel Leó Strasse 25-29, Budapest H-1023, Hungary