GSTM1 and cancer: The modulation of anti-B[a]PDE-DNA adducts in the lymphocyte plus monocyte fraction (LMF) by GSTM1-null and some low-activity NER genotypes may be considered a potential genetic susceptibility factor capable of modulating individual responses to PAH (B[a]P) genotoxic exposure and the consequent risk of cancer in coke oven workers [42].