[1] Polytech Univ Marche, Rheumatol Clin, Jesi, Italy
[2] Inst Rheumatol, Fac Med 1, Prague, Czech Republic
[3] Dept Rheumatol, Prague, Czech Republic
[4] Univ Hosp Motol, Dept Pediat & Adult Rheumatol, Prague, Czech Republic
[5] Kalmar Cty Hosp, Internal Med Clin, Rheumatol Dept, Kalmar, Sweden