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1．Carabello BA．Aortic Stenosis．N Engl J Med；2002；346∶677‐682 2．Iung B，Baron G，Butchart EG，et al．A prospective survey of patients with valvular heart disease in Europe：The Euro Heart Survey on Valvular Heart Disease．Eur Heart J；2003；24∶1231‐1243 （曾定尹） ......