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3. Prevention and treatment of venous thromboembolism. International Consensus Statement (guidelines according to scientific evidence);Nicolaides;Int Angiol,2006
4. NICE Clinical Guideline 46 − Venous Thromboembolism: Reducing the Risk of Venous Thromboembolism (Deep Vein Thrombosis and Pulmonary Embolism) in Inpatients Undergoing Surgery London National Institute for Health and Clinical Excellence 2007
5. NICE Clinical Guideline 92 - Venous Thromboembolism: Reducing the Risk London National Institute for Health and Clinical Excellence 2010