The influence of R-wave amplitude on the degree of ST-segment depression in exercise electrocardiography in the individual patient - Cokkinos, Dennis V; Papantonakos, Apostolos; Perrakis, Costas; Argyrakis, Spyros; Kouvaras, George; Tzonou, Anastasia; Patsouros, Kyriakos (Angiology, 1987)