[1] Hosp Gen Agudos Bernardino Rivadavia, Rheumatol Unit, Buenos Aires, DF, Argentina
[2] Hosp Gen Agudos Bernardino Rivadavia, Buenos Aires, DF, Argentina
[3] Inst Lucha Antipoliomielit & Rehabil Lisiado, Rosario, Santa Fe, Argentina
[4] Hosp Univ San Jorge, Pereira, Colombia
[5] CEMIC, Buenos Aires, DF, Argentina
[6] Hosp Italiano La Plata, La Plata, Buenos Aires, Argentina
[7] Inst Invest Clin Zarate, Zarate, Argentina
[8] Pfizer SRL, Buenos Aires, DF, Argentina