1) European Carotid Surgery Trialists’ Collaborative Group:MRC European Carotid Surgery Trial:interim results for symptomatic patients with severe (70-99%) or with mild (0-29%) carotid stenosis. Lancet 337:1235-1243, 1991
2) North American Symptomatic Carotid Endarterectomy Trial Collaborators:Beneficial effect of carotid endarterectomy in symptomatic patients with high-grade carotid stenosis. N Engl J Med 325:445-453, 1991
3) Chaturvedi S, Bruno A, Feasby T, et al:Carotid endarterectomy-An evidence-based review:Report of the Therapeutics and Technology Assessment Subcommittee of the American Academy of Neurology. Neurology 65:794-801, 2005
4) Carpenter JP, Lexa FJ, Davis JT:Determination of duplex Doppler ultrasound criteria appropriate to the North American Symptomatic Carotid Endarterectomy Trial. Stroke 27:695-699, 1996
5) Hirsch AT, Haskal ZJ, Hertzer NR, et al:ACC/AHA 2005 Guidelines for the Management of Patients With Peripheral Arterial Disease (Lower Extremity, Renal, Mesenteric, and Abdominal Aortic):A Collaborative Report from the American Association for Vascular Surgery/Society for Vascular Surgery, Society for Cardiovascular Angiography and Interventions, Society for Vascular Medicine and Biology, Society of Interventional Radiology, and the ACC/AHA Task Force on Practice Guidelines (Writing Committee to Develop Guidelines for the Management of Patients with Peripheral Arterial disease). J Am Coll Cardiol 47:e1-e192, 2006