- Abstract Number: 1626 • 2015 ACR/ARHP Annual Meeting - The Association of HLA-DRB1 Alleles and Amino Acid Residues with Radiographic Severity in African Americans with Seropositive Rheumatoid ArthritisBackground/Purpose: Val and Leu at HLA-DRB1 position 11 have been reported to be associated with radiographic progression in Caucasians with RA, independent of shared epitope…
