AHRR and lung cancer: In lung tissue from subjects affected with lung cancer, we validated 3 of the 14 CpG sites in the intergenic region 2q37.1 (cg21566642 and cg05951221) and in the AHRR gene (cg05575921) at a Bonferroni-corrected P value of 3.57 × 10−3 (Additional file 2: Table S2).