en original article anti-tissue transglutaminase, Celiac disease, Iran, Marsh classification, Prevalence 20186 20197 https://jpp.mums.ac.ir/article_28142.html Katayoun Malakouti malakoutikatayoun@gmail.com 123715 No Student Research Committee of Sabzevar University of Medical Sciences, Sabzevar, Iran. Elham Navipour elhamnavipour@gmail.com 123717 No Department of Community Medicine, Faculty of Medicine, Sabzevar University of Medical Sciences, Sabzevar, Iran. Mohammad Amin Ebrahimi mohammadaminebrahimi105@gmail.com 123713 No Student Research Committee of Sabzevar University of Medical Sciences, Sabzevar, Iran. Ali Khatib khatib.nurse@gmail.com 123714 No Nursing Student, Neyshabur University of Medical Sciences, Neyshabur, Iran. Morteza Rastisani rastim@medsab.ac.ir 123716 No Department of Pediatric Neonatology, Faculty of Medicine, Sabzevar University of Medical Sciences, Sabzevar, Iran. Mithra Azra Aldaghi m.a.aldaghi@gmail.com 123712 Yes Department of Pediatric Gastroenterology, Faculty of Medicine, Sabzevar University of Medical Sciences, Sabzevar, Iran.