elham tavanai department of audiology, school of rehabilitation, tehran university of medical sciences, tehran, iran saeid farahani department of audiology, school of rehabilitation, tehran university of medical sciences, tehran, iran mansoureh adel-ghahraman department of audiology, school of rehabilitation, tehran university of medical sciences, tehran, iran shohreh jalaie biostatistics, school of rehabilitation, tehran university of medical sciences, tehran, iran leila kouti department of clinical pharmacy, school of pharmacy, jondishapur university of medicine, ahvaz, iran farzad shidfar department of nutrition and biochemistry, school of public health, tehran university of medical sciences, tehran, iran