title: [ABO blood groups and Rh factor in rheumatoid arthritis in children].
mesh_terms: D000017:ABO Blood-Group System; D000293:Adolescent; D001172:Arthritis, Rheumatoid / Q000097:blood*; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D007223:Infant; D008297:Male; D012204:Rh-Hr Blood-Group System; D012217:Rheumatoid Factor
chemical_list: D000017:ABO Blood-Group System; D012204:Rh-Hr Blood-Group System; D012217:Rheumatoid Factor
vernacular_title: Grupy krwi ABO i czynnik Rh w gośćcu przewlekłym postepujacym u dzieci.