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Benjamin SB, Maher KA, Cattau EL Jr, Collen MJ, Fleischer DE, Lewis JH, Ciarleglio CA, Earll JM, Schaffer S, Mirkin K, et al.Benjamin SB, et al. Among authors: collen mj.Gastroenterology. 1988 Sep;95(3):581-8. doi: 10.1016/s0016-5085(88)80001-5.Gastroenterology. 1988.PMID: 3294079Free article.Clinical Trial.