Lippincott, Williams & Wilkins, The American Journal of Gastroenterology, 5(96), p. 1553-1557, 2001
DOI: 10.1111/j.1572-0241.2001.03776.x
Lippincott, Williams & Wilkins, The American Journal of Gastroenterology, 5(96), p. 1553-1557, 2001
DOI: 10.1016/s0002-9270(01)02339-5
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