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Lau GK, Yiu HH, Fong DY, Cheng HC, Au WY, Lai LS, Cheung M, Zhang HY, Lie A, Ngan R, Liang R.Lau GK, et al.Gastroenterology. 2003 Dec;125(6):1742-9. doi: 10.1053/j.gastro.2003.09.026.Gastroenterology. 2003.PMID: 14724827Clinical Trial.