Compared to many other ethnic groups , deafness-associated variants of the coding region of GJB2 are rare in Sudan and Kenya , suggesting a role of other genetic , or epigenetic factors as a cause for deafness in these countries .
O O O O O O O B-DiseaseOrPhenotypicFeature O O O O O O B-GeneOrGeneProduct O O O O O O O O O O O O O O O O O O O O O B-DiseaseOrPhenotypicFeature O O O O