Figure 2From: Anticitrullinated protein antibody (ACPA) in rheumatoid arthritis: influence of an interaction between HLA-DRB1 shared epitope and a deletion polymorphism in glutathione s-transferasein a cross-sectional studyAge- and gender-adjusted associations of composite HLA-DRB1 SE dose (0, 1 or 2 alleles) and GSTM1 status with ACPA positivity in Caucasian patients enrolled in SONORA ( n = 610).Back to article page