Anticorpos anti-C1q, anticromatina/nucleossomo e anti-dsDNA em pacientes com lúpus eritematoso sistêmico juvenil [Rev Bras Reumatol 2012; 52(6):971-81] Anti-C1q, anti-chromatin/nucleosome, and anti-dsDNA antibodies in juvenile systemic lupus erythematosus patients [Rev Bras Reumatol 2012; 52(6):971-81]