Notably, HSP70-2 (Hspa1B) polymorphism (rs1061581) was the only HSP70 polymorphism that had a significant association with NIHL in both Chinese and Swedish sample sets (Yang et al., 2006; Konings et al., 2009), which is thought to be evidence for NIHL susceptibility. This evidence concerns the gene HSPA1B and noise induced hearing loss.