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Best Practice & Research Clinical Gastroenterology > 2003 > 17 > 4 > 519-542
Digestive Diseases and Sciences > 2002 > 47 > 5 > 1034-1048
Best Practice & Research Clinical Gastroenterology > 2003 > 17 > 4 > 519-542
Digestive Diseases and Sciences > 2002 > 47 > 5 > 1034-1048