Report of a New Mutation and Frequency of Connexin 26 gene (GJB2) Mutations in Patients from Three Provinces of Iran - A Hosseinipour,; M Hashemzadeh Chaleshtori,; R Sasanfar,; DD Farhud,; A Tolooi,; M Doulati,; L Hoghooghi Rad,; M Montazer zohour,; M Ghadami, (Iranian Journal of Public Health)