Other common genes including MTHFR, GSTM1, CYP17A1, and CACNB2 are implicated in neurological disorders such as epilepsy (Scher et al., 2011; Glister et al., 2012; Chbili et al., 2014; Kim and State, 2014). The gene discussed is GSTM1; the disease is epilepsy.