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Box and whisker plots showing total faecal sulphide concentration in patients with ulcerative colitis (n=37) grouped according to treatment with oral drug therapy. (A) Sulphide concentrations in patients treated with 5-aminosalicylic acid (5-ASA) drugs alone or in combination with prednisolone (n=29) versus no 5-ASA (n=8). (B) Sulphide concentrations in patients treated with prednisolone alone or in combination with 5-ASA (n=11) versus no prednisolone (n=26).
