4[4]Cohn JN,Johnson G Zesche S,et al.A comparison of enalapril with hyaralazine isosorbide diritrate in the treatment of elucnic corgestive heart failure[J].N Engl J Med,1991,325:303.
2Consensus recommendations for the management of chronic heart failure.On behalf of the membership of the advisory council to improve outcomes nationwide in heart failure[].The American Journal of Cardiology.1999