Aspirin versus coumadin in the prevention of reocclusion and recurrent ischemia after successful thrombolysis: a prospective placebo-controlled angiographic study. Results of the APRICOT Study - Meijer,A.; Verheugt,F.W.; Werter,C.J.; Lie,K.I.; van der Pol,J.M.; van Eenige,M.J. (Circulation, 1993)