title: Toward a stable clinical classification of unstable angina.
authors.forename: J
authors.initials: J
authors.lastname: Lindenfeld
authors.forename: D A
authors.initials: DA
authors.lastname: Morrison
mesh_terms: D000789:Angina, Unstable / Q000145:classification* / Q000628:therapy; D006801:Humans; D017410:Practice Guidelines as Topic; D011379:Prognosis; D012307:Risk Factors; D012720:Severity of Illness Index; D014481:United States; D014483:United States Dept. of Health and Human Services