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Poon, R. T. P., Ho, J. W. Y., Tong, C. S. W., Lau, C., Ng, I. O. L., & Fan, S.-T. (2004). Prognostic significance of serum vascular endothelial growth factor and endostatin in patients with hepatocellular carcinoma. British Journal of Surgery, 91(10), 1354–1360. doi:10.1002/bjs.4594 
10.1002/bjs.4594