As shown in S3 Table, a total of 66 (24 novel and 42 known) genotypes of GJB2 was observed in the studied cohort of 1067 hearing-impaired subjects, including 44 (16 novel and 28 known) genotypes carrying at least one of pathogenic mutation(s), 21 (8 novel and 13 known) genotypes harboring only polymorphism(s) and a genotype lacking any copy of variants. The gene discussed is GJB2; the disease is sensory perception of sound.