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Best Practice & Research Clinical Gastroenterology > 2001 > 15 > 6 > 963-982
Best Practice & Research Clinical Gastroenterology > 2001 > 15 > 1 > 135-153
Best Practice & Research Clinical Gastroenterology > 2001 > 15 > 6 > 963-982
Best Practice & Research Clinical Gastroenterology > 2001 > 15 > 1 > 135-153