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Letters to the editor
Cholecystokinin infusion and gall bladder dysfunction
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Editor,—We read with interest the commentary by Al-Musawi and Williamson (Gut1998;43:454–5) and the paper in the same issue by Smythe et al(Gut1998;43:571–8). We agree with Al-Musawi and Williamson that six months is an inadequate follow up time, that identification of cystic duct abnormalities is important and in particular that cholecystokinin (CCK) scintigraphy is a more accurate technique than either ultrasound or oral cholecystography. We however disagree with their view that the CCK provocation test, based solely …