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Consort diagram of patient selection. Dotted line indicates the cut-off between the trend study and the matching study. AMICS, acute myocardial infarction and cardiogenic shock; CCL, cardiac catheterisation laboratory; eGFR, estimated glomerular filtration rate; IABP, intra-aortic balloon pump; LVEF, left ventricular ejection fraction; PCI, percutaneous coronary intervention.
