References
- Dalen JE, Alpert JS. Natural history of pulmonary embolism. Prog Cardiovasc Dis 1975: 17(4): 259–70
- Alpert JS, Smith R, Carlson CJ, et al. Mortality in patients treated for pulmonary embolism. JAMA 1976: 236(13): 1477–80
- Dalen JE, Paraskos J A, Ockene IS, et al. Venous thromboembolism: scope of the problem. Chest 1986: 89(5 Suppl): 370S–373S
- The PIOPED Investigators. Value of the ventilation/perfusion scan in acute pulmonary embolism: results of the Prospective Investigation of Pulmonary Embolism Diagnosis (PIOPED). JAMA 1990: 263(20): 2753–9
- Moser KM. Venous thromboembolism. Am Rev Respir Dis 1990: 141(1): 235–49
- Kipper MS, Moser KM, Kortman KE, et al. Longterm follow-up of patients with suspected pulmonary embolism and a normal lung scan: perfusion scans in embolic suspects. Chest 1982: 82(4): 411–5
- Hull RD, Raskob GE, Hirsh J, et al. Continuous intravenous heparin compared with intermittent subcutaneous heparin in the initial treatment of proximal-vein thrombosis. N Engl J Med 1986: 315(18): 1109–14
- Hull RD, Raskob GE, Rosenbloom D, et al. A precise protocol for intravenous heparin therapy for venous thrombosis. (Abstr) Circulation 1990: 82(4 Suppl): 111–604
- Hull RD, Raskob GE, Rosenbloom D, et al. Heparin for 5 days as compared with 10 days in the initial treatment of proximal venous thrombosis. N Engl J Med 1990: 322(18): 1260–4
- Hirsh J, Poller L, Deykin D, et al. Optimal therapeutic range for oral anticoagulants. Chest 1989: 95(2 Suppl): 5S–11S [erratum, Chest 1989: 96(4): 962]
- Hull R, Hirsh J, Jay R, et al. Different intensities of oral anticoagulant therapy in the treatment of proximal-vein thrombosis. N Engl J Med 1982: 307(27): 1676–81
- Prevention of fetal postoperative pulmonary embolism by low doses of heparin: an international multicentre trial. Lancet 1975: 2(7924): 45–51
- Collins R, Scrimgeour A, Yusuf S, et al. Reduction in fatal pulmonary embolism and venous thrombosis by perioperative administration of subcutaneous heparin: overview of results of randomized trials in general, orthopedic, and urologic surgery. N Engl J Med 1988: 318(18): 1162–73
- Hull RD, Raskob GE, Hirsh J. Prophylaxis of venous thromboembolism: an overview. Chest 1986: 89(5 Suppl): 374S–383S.
- Leyvraz PF, Richard J, Bachmann F, et al. Adjusted versus fixed-dose subcutaneous heparin in the prevention of deep-vein thrombosis after total hip replacement. N Engl J Med 1983: 309(16): 954–8
- Powers PJ, Gent M, Jay RM, et al. A randomized trial of less intense postoperative warfarin or aspirin therapy in the prevention of venous thromboembolism after surgery for fractured hip. Arch Intern Med 1989: 149(4): 771–4