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GI Bleeding Team, Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, Minnesota Reprint requests and correspondence: Louis M. Wong Kee Song, M.D., Mayo GI Bleeding Team, Division of Gastroenterology and Hepatology, Mayo Clinic, 200 1st Street S.W., Rochester, MN 55905. CONFLICT OF INTEREST Guarantor of the article: Louis M. Wong Kee Song, M.D. Specific author contributions: Dr. Wong Kee Song: manuscript preparation and drafting; Dr. Baron: critical review of manuscript. Financial support: None. Potential competing interests: None.
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Song et al. (2008) studied this question.
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