SLC26A4 and deafness: In order to further investigate genetic factors, the microarray method was applied to screen 15 common mutations in 4 deafness genes (GJB2 c.35delG, c.176_191del, c.235delC, and c.299_300del AT; GJB3 c.538C>T; SLC26A4 c.1174 A>T, c.1226G>A, c.1229C>T, c.1975G>C, c.2027T>A, c.2168A>G, c.919-2A>G, c.1707 + 5G>A; MT-RNR1 m.1555A>G and m.1494C>T).