GSTP1 and noise induced hearing loss: Shen et al. (2012) analyzed the polymorphism of GST gene in 444 workers with NIHL and 445 workers with normal hearing to find out the relationship between the polymorphism and the susceptibility to NIHL. The results showed that null genotype of GSTM1 rs10712361 had a higher risk of NIHL comparing with wild-type genotype. Lin et al. (2009) found that individuals carrying all genotypes with GSTM1 null, GSTT1 null, and GSTP1 lle (Guo et al., 2017)/lle (Guo et al., 2017) were more susceptible to NIHL.