the main findings were predominance of jca of polyarticular onset with a relatively low occurrence of jca of pauci-articular onset , a high prevalence of positive rheumatoid factor tests and a very low number of patients positive for antinuclear factor , and an equal overall sex ratio ( however , there was a preponderance of males in the subgroup with jca involving only 2 - 4 joints ) .
C3495559
jca
C0022417
joints