1Centre for Pharmacoeconomics, Warsaw, Poland, 2Clinical Institute Ion Cantacuzino, Bucharest, Romania, 3Clinical Hospital Zagreb, Zagreb, Croatia, 4Methodical Rheumatology Center Prof. Dr. Ion Stoia, Bucharest, Romania, 5Institut za reumatologiju, Beograd, Serbia and Montenegro, 6Consultant for Health Economics and Management, Beograd, Serbia and Montenegro, 7Corvinus University Budapest, Budapest, Hungary, 8University of Medicine, Saint Maria UMF Carol Davila Hospital, Bucharest, Romania, 9University Hospital St. Ivan Rilski, Sofia, Bulgaria, 10Rheumatology Institute of RAMS, Moscow, Russia, 11Corvinus University of Budapest, Budapest, Hungary, 12University Medical Centre, Ljubljana, Slovenia, 13Pharma projects s.r.o., Praha, Czech Republic, 14Military Medical Institute, Warsaw, Poland, 15University Medical Center, Ljubljana, Slovenia, 16East Tallinn Central Hospital, Tallinn, Estonia, 17Klinicki centar Niš, Nis, Serbia and Montenegro, 18Medical University of Wroclaw, Wroclaw, Poland