More recently, the same authors, with similar approach identified 7 SNPs in 6 genes (CYP27B1, MAT1A1, CHST1, CYP4B1, ADH6, and SLC22A1) associated with the occurrence of skin rash in advanced non-small cell lung cancer treated with erlotinib [20]. The gene discussed is CYP27B1; the disease is non-small cell lung carcinoma.