1. Department of Speech Therapy, School of Rehabilitation, Tehran University of Medical Sciences, Tehran, Iran
2. Department of Educational Psychology, School of Education, Baylor University, TX, USA
3. Department of Speech Therapy, Tehran University of Medical Sciences, Tehran, Iran
4. Department of Occupational Therapy, School of Rehabilitation, Tehran University of Medical Sciences, Tehran, Iran
5. Department of Biostatistics and Epidemiology, School of Health, Guilan University of Medical Sciences, Rasht, Iran