[1] Howard Univ, Internal Med, Washington, DC 20059 USA
[2] Hosp Clin Pte Dr Nicolas Avellaneda, Rheumatol Dept, San Miguel De Tucuman, Argentina
[3] NYU, Sch Med, Dept Med, Div Rheumatol, New York, NY USA
[4] Washington DC VAMC, Rheumatol, Washington, DC USA
[5] Georgetown, Washington, DC USA
[6] Howard Univ, Washington, DC 20059 USA
[7] NYU, Sch Med, New York, NY USA