GJB2 and deafness: Deletion of T at position 167 (mutation 167delT) and G at position 35 of the GJB2 (mutation 35delG) results in premature chain termination in Non-syndromic Neurosensory Autosomal Recessive Deafness (NSRD) in Italian patients.9 These findings represents that the variation in GJB2 affect the normal function of GJB2 leading to HL or deafness.