Chen, Liwei, Ling Han, and Jingguang Luo. “Risk Factors for Predicting Mortality Among Old Patients With Acute Myocardial Infarction During Hospitalization”. The Heart Surgery Forum 22, no. 2 (April 16, 2019): E165-E169. Accessed March 28, 2024. https://journal.hsforum.com/index.php/HSF/article/view/2265.