1. Heit JA, Silverstein MD, Mohr DN, Petterson TM, O’Fallon WM, Melton LJ 3rd. Risk factors for deep vein thrombosis and pulmonary embolism: A population‑based case‑control study. Arch Intern Med 2000;160:809‑15.
2. Geerts WH, Code KI, Jay RM, Chen E, Szalai JP. A prospective study of venous thromboembolism after major trauma. N Engl J Med 1994;331:1601‑6. 3. Geerts WH, Jay RM, Code KI, Chen E, Szalai JP, Saibil EA, et al. A comparison of low‑dose heparin with low‑molecular‑weight heparin as prophylaxis against venous thromboembolism after major trauma. N Engl J Med 1996;335:701‑7.
4. Norwood SH, McAuley CE, Berne JD, Vallina VL, Kerns DB, Grahm TW, et al. A potentially expanded role for enoxaparin in preventing venous thromboembolism in high risk blunt trauma patients. J Am Coll Surg 2001;192:161‑7.
5. Gould MK, Garcia DA, Wren SM, Karanicolas PJ, Arcelus JI, Heit JA, et al. Prevention of VTE in nonorthopedic surgical patients: Antithrombotic Therapy and Prevention of Thrombosis, 9th ed: American College of Chest Physicians Evidence‑Based Clinical Practice Guidelines. Chest 2012;141:e227S‑77S.
6. Cohen AT, Tapson VF, Bergmann JF, Goldhaber SZ, Kakkar AK, Deslandes B, et al. Venous thromboembolism risk and prophylaxis in the acute hospital care setting (ENDORSE study): A multinational cross‑sectional study. Lancet 2008;371:387‑94.
7. Wilasrusmee C, Kiranantawat K, Horsirimanont S, Lertsithichai P, Reodecha P, Soonthonkit Y, et al. Deep venous thrombosis in surgical Intensive Care Unit: Prevalence and risk factors. Asian J Surg 2009;32:85‑8.
8. Prichayudh S, Tumkosit M, Sriussadaporn S, Samorn P, Pak‑art R, Sriussadaporn S, et al. Incidence and associated factors of deep vein thrombosis in Thai surgical ICU patients without chemoprophylaxis: One year study. J Med Assoc Thai 2015;98:472‑8.
9. Wong TH, Koh MP, Ng J. Symptomatic venous thromboembolism in Asian major trauma patients: Incidence, presentation and risk factors. Eur J Trauma Emerg Surg 2013;39:495‑500.
10. Gangireddy C, Rectenwald JR, Upchurch GR, Wakefield TW, Khuri S, Henderson WG, et al. Risk factors and clinical impact of postoperative symptomatic venous thromboembolism. J Vasc Surg 2007;45:335‑41.
11. Xenos ES, Vargas HD, Davenport DL. Association of blood transfusion and venous thromboembolism after colorectal cancer resection. Thromb Res 2012;129:568‑72.