GJB2 and hearing loss disorder: Mutations in gap junction beta‐2 gene (GJB2, MIM #121011) account for 50% of autosomal recessive hearing loss (HL) in most populations in the world (Palmada et al., 2006; Wiley, Choo, Meinzen‐Derr, Hilbert, & Greinwald, 2006).