1. Student Research Committee, Hamadan University of Medical Sciences, Hamadan, Iran
2. Clinical Research Development Unit of Shahid Beheshti Hospital, Hamadan University of Medical Sciences, Hamadan, Iran
3. Gastroenterology
Ward, Farheekhtegan Hospital, Azad University of Medical Sciences, Tehran, Iran
4. Autism Spectrum Disorders Research Center, Hamadan University of Medical Sciences, Hamadan, Iran