Abstract Background Mutations in GJB2 are the most common molecular defects responsible for autosomal recessive nonsyndromic hearing impairment (NSHI). The mutation spectra of this gene vary among different ethnic groups. Methods In order to understand the spectrum and frequency of GJB2 mutations in the Chinese population. the coding region of the GJB2 gene from 2063 unrelated patient... https://bellfordtoysandhobbiers.shop/product-category/airliner/