It has been reported that EVA might also be caused by the heterozygote of SLC26A4 and FOXI1, or double gene inheritance of SLC26A4 and KCNJ10, which is the first example where double gene inheritance has been proven to be the cause of deafness in human beings (Naseri et al., 2018). This evidence concerns the gene SLC26A4 and deafness.