SLC26A4 and deafness: In 2,352 patients with non-syndromic deafness from 27 cities in China, the positivity rates of three known pathogenic sites of the SLC26A4 gene, c.919-2A > G, c.2168A > G, and c.1229C > T, were 11.52, 2.5%, and 0.51%, respectively.