Circadian variation in the frequency of onset of acute myocardial infarction - Muller, JE; Stone, PH; Turi, ZG; Rutherford, JD; Czeisler, CA; Parker, C; Poole, WK; Passamani, E; Roberts, R; Robertson, T; Sobel, BE; Willerson, JT; Braunwald, E; and the MILIS Study Group (N Engl J Med, 1985)