Chen et al. [22], Liang KC et al. [56], Cao YF et al. [45], Pan et al. [39], Piao et al. [40], and Zhang et al. [38] suggested that the GSTM1 and GSTT1 polymorphisms in combination were associated with increased risk factors of lung cancer in Asians. The gene discussed is GSTM1; the disease is lung carcinoma.