[1] Natl & Kapodistrian Univ Athens, Attikon Univ Gen Hosp, Sch Med, Dept Internal Med 4, Chaidari, Greece
[2] Cleveland Clin, Orthoped & Rheumatol Inst, Dept Rheumat & Immunol Dis, Cleveland, OH 44106 USA
[3] Cleveland Clin, Dept Infect Dis, Cleveland, OH 44106 USA
[4] Natl & Kapodistrian Univ Athens, Sch Med, Dept Med & Lab 2, Clin Immunol Rheumatol Unit,Joint Rheumatol Progr, Athens, Greece