Risk of stroke in chronic heart failure patients without atrial fibrillation: analysis of the Controlled Rosuvastatin in Multinational Trial Heart Failure (CORONA) and the Gruppo Italiano per lo Studio della Sopravvivenza nell'Insufficienza Cardiaca-Heart Failure (GISSI-HF) Trials - Abdul-Rahim, A H; Perez, A-C; Fulton, R L; Investigators of the Controlled Rosuvastatin Multinational Study in Heart Failure (CORONA); GISSI-Heart Failure (GISSI-HF) Committees and Investigators (Circulation, 2015)