Higher GPIbα level instrumented by cis‐pQTL was associated with a higher risk of JIA, with an odds ratio (OR) of 2.45 (95% confidence interval [95% CI] 1.40–4.29) (P = 1.71 × 10−3) (Figure 2 and Supplementary Table 4, available on the Arthritis & Rheumatology website at http://onlinelibrary.wiley.com/doi/10.1002/art.41561/abstract). The gene discussed is GP1BA; the disease is juvenile idiopathic arthritis.