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Digestive Diseases and Sciences > 2008 > 53 > 6 > 1468-1487
Digestive Diseases and Sciences > 1997 > 42 > 11 > 2277-2284
Digestive Diseases and Sciences > 2008 > 53 > 6 > 1468-1487
Digestive Diseases and Sciences > 1997 > 42 > 11 > 2277-2284