Fox KA, Anderson FA, Dabbous OH, Steg PG, L?pez-Send?n J, Van de Werf F, Budaj A, Gurfinkel EP, Goodman SG, Brieger D. Intervention in acute coronary syndromes: do patients undergo intervention on the basis of their risk characteristics? The Global Registry of Acute Coronary Events (GRACE). Heart. 2007 Feb; 93(2):177-82.