title: Circadian variations in acute myocardial infarction: patients or health care delivery?
authors.forename: Frederick A
authors.initials: FA
authors.lastname: Spencer
authors.forename: Richard C
authors.initials: RC
authors.lastname: Becker
mesh_terms: D039602:After-Hours Care / Q000706:statistics & numerical data*; D015906:Angioplasty, Balloon, Coronary / Q000706:statistics & numerical data*; D002940:Circadian Rhythm / Q000502:physiology*; D006801:Humans; D009203:Myocardial Infarction / Q000503:physiopathology* / Q000628:therapy*; D017063:Outcome Assessment, Health Care / Q000706:statistics & numerical data*; D011787:Quality of Health Care / Q000706:statistics & numerical data*; D013997:Time Factors