1. Student Researches Committee, Ilam University of Medical Sciences, Ilam, Iran;
2. Department of Pathology, Faculty of Medicine, Ilam University of Medical Sciences, Ilam, Iran;
3. Department of Gastroenterology, Faculty of Medicine, Ilam University of Medical Sciences, Ilam, Iran;
4. Department of Epidemiology, Faculty of Medicine, Ilam Medical Sciences University, Ilam, Iran;
5. The Researches Centre of Psychosocial Injuries, Faculty of Medicine, Ilam University of Medical Science, Ilam, Iran;
6. Department of Biostatics, Faculty of Medicine, Ilam University of Medical Sciences, Ilam, Iran