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1دورية أكاديمية
المؤلفون: Keith Siau, Crossley, James, Dunckley, Paul, Johnson, Gavin, Feeney, Mark, Iacucci, Marietta, Anderson, John T.
المصدر: American Journal of Gastroenterology (Lippincott Williams & Wilkins); Feb2020, Vol. 115 Issue 2, p234-243, 10p, 5 Charts, 3 Graphs