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Armaghan Fard-Esfahani, Babak Fallahi, Bahare Saidi, Mahsa Ghorbani, Mohammad Eftekhari,

alireza bakhshipour department of gastroenterology, digestive disease research center, shariati hospital, tehran university of medical sciences, tehran, iran. romina rabbani department of gastroenterology, digestive disease research center, shariati hospital, tehran university of medical sciences, tehran, iran. shapoor shirani department of radiology, tehran heart center, tehran university of medical science, tehran, iran. hosein asl soleimani department of gastroenterology, digestive disease research center, shariati hospital, tehran university of medical sciences, tehran, iran. javad mikaeli department of gastroenterology, digestive disease research center, shariati hospital, tehran university of medical sciences, tehran, iran.