ST depression in ECG at entry indicates severe coronary lesions and large benefits of an early invasive treatment strategy in unstable coronary artery disease. The FRISC II ECG substudy. - Diderholm,E.; Andren,B.; Frostfeldt,G.; Genberg,M.; Jernberg,T.; Lagerqvist,B.; Lindahl,B.; Wallentin,L. (Eur Heart J, 2002)