Administrative change and diagnostic test use. The effect of eliminating standing orders.
D003327:Coronary Disease; D003422:Critical Care; D003955:Diagnostic Tests, Routine / Q000706:statistics & numerical data*; D004562:Electrocardiography; D006075:Governing Board; D006333:Heart Failure; D006784:Hospitals, Teaching / Q000458:organization & administration; D006801:Humans; D009203:Myocardial Infarction; D009519:New York City; D013902:Radiography, Thoracic; D012189:Retrospective Studies