More on thromboprophylaxis: Quantifying risk for venous thromboembolism - Arya, Roopen; Paneesha, Shankaranarayana; McManus, Aidan; Parsons, Nick; Scriven, Nicholas; Farren, Timothy; Nokes, Tim; Smith, Harry; O‘Shaughnessy, Denise; Rose, Peter (Thrombosis and Haemostasis, 2009)