[1] JM Ramos Mejia Hosp, Div Rheumatol, 609 Gen Urquiza St, RA-1221 Buenos Aires, DF, Argentina
[2] Birmingham VA Med Ctr, 700 19th St S, Birmingham, AL 35233 USA
[3] Univ Alabama Birmingham, Div Rheumatol & Clin Immunol, 1825 Univ Blvd,SHEL 306, Birmingham, AL 35294 USA