Coronary artery thrombus as a risk factor for acute vessel occlusion during percutaneous transluminal coronary angioplasty: improving results - Sugrue, D D; Holmes, D R, Jr; Smith, H C; Reeder, G S; Lane, G E; Vlietstra, R E; Bresnahan, J F; Hammes, L N; Piehler, J M (Br Heart J, 1986)