GJB2 and hearing loss disorder: In the Chinese population, the carrier rates of common hereditary hearing loss variants are as follows:GJB2 variants: c.235delC: ∼1.80%, c.299_300delAT: ∼0.50%, c.176del16: ∼0.12%, c.35delG: ∼0.01%, c.109G > A: ∼6.93%; SLC26A4 variants: c.919-2A > G: ∼1.34%, c.2168A > G: ∼0.27%, c.1229C > T: ∼0.08%; 12S rRNA variants: m.1555A > G: ∼0.21%, m.1494C > T: ∼0.02%, m.7445A > C: ∼0.02%, m.12201T > C: ∼0.01%; c.538C > T: ∼0.30% (14).