1Edwards FH,Clark RE,Schwartz M. Coronary artery bypass grafting:the Society of Thoracic Surgeons National Database experience[J]. Ann Thorac Surg,1994;57:12.
2Tu JV,Jaglal SB,Naylor CD. Multicenter validation of a risk index for mortality,intensive care unit stay,and overall hospital length of stay after cardiac surgery. Steering Committee of the Provincial Adult Cardiac Care Network of Ontario[J]. Circulation, 1995 ;91:677.