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Comparison of the representative colonoscopy images from the 2 treatment groups: (A) severe obscuration caused by intraluminal gas bubbles with PEG-Asc use; (B) excellent visibility with no intraluminal gas bubbles with PEG-Asc plus simethicone use. PEG-Asc = polyethylene glycol with ascorbic acid, PEG-Asc plus simethicone = polyethylene glycol with ascorbic acid plus simethicone.
