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The role of B/D ratio and A/D ratio to defferentiate malignancy from benignancy in distal extrahepatic bileduct obstruction
Hyun Chul Rhim, JUng Hwan Baek, Eui Yong Jeon, Byung Hee Koh, On Koo Cho, Young Hwan Kim
J Korean Soc Med Ultrasound. 1994;13(2):103-107.
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