RT Journal Article SR Electronic T1 Prophylaxis of venous thromboembolism in patients with lower limb plaster cast immobilisation JF Emergency Medicine Journal JO Emerg Med J FD BMJ Publishing Group Ltd and the British Association for Accident & Emergency Medicine SP 495 OP 496 DO 10.1136/emj.2006.034983 VO 24 IS 7 A1 E Brown A1 A Bleetman YR 2007 UL http://emj.bmj.com/content/24/7/495.abstract AB