TF and deep vein thrombosis: The Quantikine® kit has been used for the measurement of TF antigen in plasma from healthy controls and patients with cancer, reporting median levels of TF antigen of 39.1 ng/L (range 16.8 ng/L–87.3 ng/L) for healthy individuals, 47.2 ng/L for patients with cancer without thrombosis, and 56.0 ng/L (range 37.6 ng/L–318.7 ng/L) for patients who developed thrombosis [26].