zahra ghayoumi department of speech therapy, university of social welfare and rehabilitation, tehran, ir iranسازمان اصلی تایید شده: دانشگاه علوم بهزیستی و توانبخشی (university of social welfare and rehabilitation sciences) fariba yadegari department of speech therapy, university of social welfare and rehabilitation, tehran, ir iran; department of speech therapy, university of social welfare and rehabilitation, tehran, ir iran. tel: +98-2122180043, fax: +98-2122180043سازمان اصلی تایید شده: دانشگاه علوم بهزیستی و توانبخشی (university of social welfare and rehabilitation sciences) behrooz mahmoodi-bakhtiari department of performing arts, university of tehran, tehran, ir iranسازمان اصلی تایید شده: دانشگاه تهران (tehran university) esmaeil fakharian trauma research center, kashan university of medical sciences, kashan, ir iranسازمان اصلی تایید شده: دانشگاه علوم پزشکی کاشان (kashan university of medical sciences) mehdi rahgozar department of biostatistics and computer, university of social welfare and rehabilitation, tehran, ir iranسازمان اصلی تایید شده: دانشگاه علوم بهزیستی و توانبخشی (university of social welfare and rehabilitation sciences) maryam rasouli department of pediatrics, faculty of nursing and midwifery, shahid beheshti university of medical sciences, tehran, ir iranسازمان اصلی تایید شده: دانشگاه علوم پزشکی شهید بهشتی (shahid beheshti university of medical sciences)