参考文章(3)
Theresa A McDonagh, Caroline E Morrison, Audrey Lawrence, Ian Ford, Hugh Tunstall-Pedoe, John JV McMurray, Henry J Dargie, Symptomatic and asymptomatic left-ventricular systolic dysfunction in an urban population. The Lancet. ,vol. 350, pp. 829- 833 ,(1997) , 10.1016/S0140-6736(97)03033-X