Stroke magnetic resonance imaging is accurate in hyperacute intracerebral hemorrhage: a multicenter study on the validity of stroke imaging - Fiebach, Jochen Benedikt; Schellinger, Peter; Gass, Achim; Hirsch, Jochen; Heiland, Sabine; Wilde, Philipp; Hacke, Werner; Sartor, Klaus (Stroke, 2004)