HLA-DRB1*04 and TAP2D were found to be in linkage disequilibrium in both the control (delta 0.018 p < 0.05) and JCA patient groups (delta 0.021 p < 0.05).
Certain HLA associations (DRB1*0801, DPB1*0201) appear to be present in patients with JA in most studies; others (DRB1*1301, DPB1*0301) are more variable.
Class I associations and frequencies of class II HLA-DRB alleles by RFLP analysis in children with rheumatoid-factor-negative juvenile chronic arthritis.