[1] Univ Antioquia, Dept Pediat, Medellin, Colombia
[2] Univ Antioquia, Grp Estudio Vasculitis Sistem, Medellin, Colombia
[3] Hosp Pablo Tobon Uribe, Medellin, Colombia
[4] Univ Antioquia, Fac Med, Grp Reumatol, Dept Med Interna, Medellin, Colombia
[5] Hosp Infantil, Hosp Univ San Vicente Fdn, Medellin, Colombia
[6] Hosp Univ San Vicente Fdn, Medellin, Colombia
[7] Univ Antioquia, Serv Salud, IPS Univ, Medellin, Colombia