Lippincott, Williams & Wilkins, The American Journal of Gastroenterology, 11(97), p. 2756-2762, 2002
DOI: 10.1111/j.1572-0241.2002.07065.x
Lippincott, Williams & Wilkins, The American Journal of Gastroenterology, 11(97), p. 2756-2762
DOI: 10.1016/s0002-9270(02)05482-5
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