GJB2 and deafness: Chen et al.[34] screened SLC26A4, FOXI1 and KCNJ10 (as well as GJB2) in patients with bilateral deafness and inner ear malformations and found no mutations in FOXI1 or KCNJ10 in the 15 who had one or zero SLC26A4 mutations; Mercer et al.[35] screened 51 patients with EVA and found no mutations in FOXI1 or KCNJ10; Jonard et al.[36] screened 25 patients with unilateral deafness and unilateral EVA but found no mutations in either KCNJ10 or FOXI1 and Wu et al. screened FOXI1 in 100 patients with EVA and found no mutations, although KCNJ10 was not screened at that time [37].