MMP9 and cancer: HM, Monocytes from healthy subjects; sH, sera from healthy subjects; LPS, lipopolysaccharide; sCaDVT-, serum from cancer patients without deep venous thrombosis; sCADVT+, serum from cancer patients with deep venous thrombosis; IL-6, Interleukin-6; TNF- α, Tumor necrosis factor alpha; IL-1β, Interleukin-1 beta; VEGF, Vascular endothelial growth factor; MMP-9, matrix metalloproteinase-9; TF, Tissue factor.