Lippincott, Williams & Wilkins, The American Journal of Gastroenterology, 7(94), p. 1941-1946, 1999
DOI: 10.1111/j.1572-0241.1999.01234.x
Lippincott, Williams & Wilkins, The American Journal of Gastroenterology, 7(94), p. 1941-1946
DOI: 10.1016/s0002-9270(99)00290-7
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