to test whether reduced hepatic uroporphyrinogen decarboxylase activity is a specific and intrinsic defect in porphyria cutanea tarda , we measured enzymatic activity in the livers of 17 patients with porphyria cutanea tarda , 12 `` '' normal '' '' control patients without liver disease , and 41 patients with other forms of porphyria , alcoholic liver disease , hemochromatosis , or chronic hepatitis .
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livers
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, alcoholic liver disea