Value of serial troponin T measures for early and late risk stratification in patients with acute coronary syndromes - Newby, LK; Christenson, RH; Ohman, M; Armstrong, PW; Thompson, TD; Lee, KL; Hamm, CW; Katus, HA; Cianciolol, C; Granger, CB; Topol, EJ; Califf, RM; for the GUSTO-IIa Investigators (Circulation, 1998)