GJB2 and mitochondrial disease: The deafness genes carried out by our population mainly included GJB2 (DFNB1A, MIM 220,290), SLC26A4 (PDS, MIM 274,600), mitochondrial DNA (mtDNA), (Mitochondrial disease, MIM 561,000), and GJB3 (DFNB1A, MIM 220,290)4.