1. American Public Health Association (2003 ) Deep-vein thrombosis: advancing awareness to protect patient lives . http://www.apha.org/NR/rdonlyres/A209F84A-7C0E-4761-9ECF-61D22E1E11F7/0/DVT_White_Paper.pdf.
2. Thromboprophylaxis rates in US medical centers: success or failure?
3. Risk Factors for Venous Thromboembolism
4. Fatal pulmonary embolism in hospitalised medical patients.