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Cosme A, Ojeda E, San Vicente MT, Barrio J, Bujanda L, López P.Cosme A, et al. Among authors: barrio j.Gastroenterol Hepatol. 2001 Dec;24(10):495-9. doi: 10.1016/s0210-5705(01)70221-x.Gastroenterol Hepatol. 2001.PMID: 11730618Spanish.