HLA-B and arthritic joint disease: Although most findings did not meet the p < 0.05 threshold in Fisher’s test (Table S3), notable associations included HLA-B*15 with reduced lumbar mobility (p = 0.033), B*37 with dactylitis (p = 0.017), B*50 with arthritis (p = 0.012), and B*57 with psoriasis (p = 0.017).