[1] Ctr Reg Enfermedades Autoinmunes Reumat GO CREAR, Rheumatol, Rosario, Argentina
[2] Hosp Cayetano Heredia, Rheumatol, Lima, Peru
[3] Unidad Invest Sociedad Argentina Reumatol, Rheumatol, Buenos Aires, DF, Argentina
[4] UNR, Escuela Estadist, Fac Ciencias Econom Estadist, Stat Dept, Rosario, Argentina
[5] Hosp Gen Guillermo Almenara Irigoyen, Div Rheumatol, EsSalud, Lima, Peru
[6] Hosp Angeles Pedregal, Rheumatol, Mexico City, DF, Mexico
[7] Univ Estadual Campinas, Fac Ciencias Med, Rheumatol, Sao Paulo, Brazil
[8] Univ Chile, Fac Med, Hosp Salvador 6, Rheumatol, Santiago, Chile
[9] Policlin Mendez Gimon, Serv Reumatol, Rheumatol, Caracas, Venezuela
[10] Univ Fed Goias, Hosp Clin, Rheumatol, Goias, Brazil
[11] Ctr Integral Reumatol Reumalab Rheumatol, Medellin, Colombia
[12] Univ Nacl Colombia, Hosp Santa Rosa Bogota, Rheumatol, Bogota, Colombia
[13] Univ Alabama Birmingham, Rheumatol, Birmingham, AL USA