1. School of Medicine, Hamadan University of Medical Sciences, Hamadan, Iran
2. Gastroenterology Ward, Farheekhtegan Hospital, Islamic Azad University of Medical Sciences, Tehran, Iran
3. Clinical Research Development Unit of Shahid Beheshti Hospital, Hamadan University of Medical Science, Hamadan, Iran
4. Autism Spectrum Disorders Research Center, Hamadan University of Medical Sciences, Hamadan, Iran
5. Department of Pathology, School of Medicine, Fatemieh Hospital, Hamadan University of Medical Sciences, Hamadan, Iran