1. ASPECT Research Group (1994) Effect of long-term anticoagulant treatment on mortality and cardiovascular morbidity after myocardial infarction. Lancet 343: 499?503
2. Bergquvist D, Lindblad B (1994) Incidence of venous thromboembolism in medical and surgical patients. In: Bergqvist D, Comerota AJ (eds) Prevention of venous thromboembolism. London Med-Orion Publ, pp 3
3. Breddin HK (1989) Thrombosis and Virchow's triad: what is established? Semin Thromb Hemost 15: 237?239
4. Bynum LJ, Wilson JE (1979) Low dose heparin therapy in the long term management of venous thromboembolism. Am J Med 67: 553?556
5. Chesebro JH, Adams PC, Fuster V (1986) Antithrombotic therapy in patients with valvular heart disease and prosthetic heart valves. JACC 8 [Suppl B]: 416?568