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within H. C. Yeung
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W. T. Ng, C. K. Kong, H. C. Yeung, K. S. Book, K. S. Yuen in Surgical Endoscopy (2001)
W.T. Ng, H.C. Yeung in Surgical Endoscopy (1997)
H. C. Yeung, W. T. Ng, C. K. Kong in Surgical Endoscopy (1997)
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