Biomarkers of disease: cerebrospinal fluid vascular endothelial growth factor (VEGF) and stromal cell derived factor (SDF)-1 levels in patients with neoplastic meningitis (NM) due to breast cancer, lung cancer and melanoma - Groves,M.D.; Hess,K.R.; Puduvalli,V.K. (J Neurooncol, 2009)