title: Letter regarding Chen et al. entitled "a systematic review of vascular endothelial growth factor expression as a biomarker of prognosis in patients with osteosarcoma".
authors.affiliation: Department of Orthopedics, The Second Xiangya Hospital of Central South University, Changsha, 410010, China.
authors.forename: Li-Hong
authors.initials: LH
authors.lastname: Liu
authors.forename: Hui
authors.initials: H
authors.lastname: Li
authors.forename: Tao
authors.initials: T
authors.lastname: Xiao
mesh_terms: D014408:Biomarkers, Tumor / Q000378:metabolism*; D001859:Bone Neoplasms / Q000401:mortality*; D006801:Humans; D012516:Osteosarcoma / Q000401:mortality*; D042461:Vascular Endothelial Growth Factor A / Q000378:metabolism*
chemical_list: D014408:Biomarkers, Tumor; D042461:Vascular Endothelial Growth Factor A