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A. Diet effect on stool frequency, (* p= 0.04) form and ease of passage; the effect on stool frequency was greater in HLA-DQ2 or 8 positive patients (p=0.019).
B. Mean bowel movements per day during 14-day baseline and 28-day diet treatment periods in each patient randomized to gluten free and gluten containing diets. HLA-DQ2/8 negative patients are indicated by the open symbols.
