CYP2D6 and exanthem: A study by Kwok et al., performed univariate logistic regression to demonstrate that gefitinib-induced skin rashes were significantly associated with the AA genotype of CYP2D6*10 (rs1065852) (OR (odds ratio) = 3.368; 95% CI (confidence interval) = 1.000–11.345; p = 0.050) [88].