Lippincott, Williams & Wilkins, The American Journal of Gastroenterology, 10(98), p. 2239-2244, 2003
DOI: 10.1111/j.1572-0241.2003.07675.x
Lippincott, Williams & Wilkins, The American Journal of Gastroenterology, 10(98), p. 2239-2244
DOI: 10.1016/s0002-9270(03)00660-9
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