Wiviott SD, Morrow DA, Frederick PD, Antman EM, Braunwald E. Application of the Thrombolysis in Myocardial Infarction risk index in non-ST-segment elevation myocardial infarction: evaluation of patients in the National Registry of Myocardial Infarction. J Am Coll Cardiol. 2006;47(8):1553-8. PMID: 16630990.