Exonic distribution of SLC26A4 mutations in East Asian EVA subjects from this and seven other studies (Tsukamoto et al., 2003; Park et al., 2005; Wu et al., 2005b; Hu et al., 2007; Wang et al., 2007; Guo et al., 2008; Lee et al., 2008) and Caucasian (western) EVA subjects from four studies (Prasad et al., 2004; Pryor et al., 2005; Albert et al., 2006; Pera et al., 2008).