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Vidal X, Ibáñez L, Vendrell L, Conforti A, Laporte JR; Spanish-Italian Collaborative Group for the Epidemiology of Gastrointestinal Bleeding.Vidal X, et al.Drug Saf. 2008;31(2):159-68. doi: 10.2165/00002018-200831020-00005.Drug Saf. 2008.PMID: 18217791