Changes in Ejection Fraction (EF) Following Sequential Anthracycline and Trastuzumab in Patients with HER2+ Early Breast Cancer (EBC) – Is There a Need for Two Echocardiograms Pre-trastuzumab?. Issue 6 (June 2017) - Fernando, S.; Okonta, L.; Sandri, I.; Wardley, A.; Mitchell, H.; Conway, A.M.