ALDH1A2 and bronchiolitis obliterans syndrome: In addition, we assessed 87 SNPs with possible evidence of association (p < 1 × 10−4) in the BEACON GWAS: Whilst none demonstrated a significant association with BO one, rs3784262 (ALDH1A2), demonstrated an association with BO/OAC: 0.90 (0.87–0.93; p = 3.72 × 10−9).