8Kumer H, Heer K, Lee PW, et al. Preoperative serum vascular endothelial growth factor can predict stage in colorectal cancer[J].Clin Cancer Res,1998,4(5): 1279~1285.
9Shimada H, Takeda A, Nabeya Y, et al. Clinical significance of serum vascular endothelial growth factor in esophageal squamous cell carcinoma[J].Cancer,2001,92(3): 663~889.