Asifudduza, Md., et al. “Modified Shock Index to Predict In-Hospital Outcome Among Patients Presenting With ST-Segment Elevation Myocardial Infarction”. Cardiology and Cardiovascular Medicine, vol. 7, no. 4, July 2023, pp. 229-40, http://www.fortunejournals.org/ojs/index.php/ccm/article/view/16418.