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Fishbein M, Kirschner BS, Gonzales-Vallina R, Ben-Ami T, Lee PC, Weisenberg E, Schmidt-Sommerfeld E.Fishbein M, et al. Among authors: kirschner bs.Gastroenterology. 1992 Nov;103(5):1664-8. doi: 10.1016/0016-5085(92)91193-8.Gastroenterology. 1992.PMID: 1426887