Lin, H., Hou, J., Tang, H., Chen, K., Guo, S., Wang, L., Sun, H., Zheng, Z. and Hu, S. (2020) “A Novel Risk Stratification System for Predicting In-Hospital Mortality Following Coronary Artery Bypass Grafting Surgery with Impaired Left Ventricular Ejection Fraction”, The Heart Surgery Forum, 23(5), pp. E621-E626. doi: 10.1532/hsf.3089.