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8Hwang G J, Kim MJ, YOO HS, et al. Nodular hepatocelluar carcinomas: detection with arterial-, portal-, and delayedphase images at spiral CT. Radiology, 1997; 202 (2): 383-388.
9Choi BI, Lee HJ, Han JK, et al. Detection of hypervascular nodular hepatocellar carcinomas: Value of triphasic helical CT compared with iodized oil CT. AJR, 1997; 168 (1): 219-224.