GJB2 and deafness: 26 Gazzaz Gazzaz B B Weil Weil D D Raïs Raïs L L Akhyat Akhyat O O Azeddoug Azeddoug H H Nadifi Nadifi S S Autosomal recessive and sporadic deafness in Morocco: High frequency of the 35delG GJB2 mutation and absence of the 342-kb GJB6 variant Autosomal recessive and sporadic deafness in Morocco: High frequency of the 35delG GJB2 mutation and absence of the 342-kb GJB6 variant Hear Res.