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Best Practice & Research Clinical Gastroenterology > 2010 > 24 > 3 > 349-358
Best Practice & Research Clinical Gastroenterology > 1999 > 13 > 2 > 253-263
Best Practice & Research Clinical Gastroenterology > 2010 > 24 > 3 > 349-358
Best Practice & Research Clinical Gastroenterology > 1999 > 13 > 2 > 253-263