A randomized trial of low osmolar ionic versus nonionic contrast media in patients with myocardial infarction or unstable angina undergoing percutaneous transluminal coronary angioplasty - Grines, CL; Schreiber, TL; Savas, V; Jones, DE; Zidar, FJ; Gangadharan, V; Brodsky, M; Levin, R; Safian, R; Puchrowicz-Ochocki, S; Castellani, MD; O’Neill, WW (J Am Coll Cardiol, 1996)