[Rheumatoid arthritis in young children].
D000367:Age Factors; D001171:Arthritis, Juvenile / Q000453:epidemiology* / Q000209:etiology; D002675:Child, Preschool; D005260:Female; D006801:Humans; D007223:Infant; D008297:Male; D011044:Poland; D012744:Sex Ratio
Reumatoidalne zapalenie stawów u małych dzieci.