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Validation of the Ottawa Subarachnoid Hemorrhage Rule in patients with acute headache
Jeffrey J. Perry, Marco L.A. Sivilotti, Jane Sutherland, Corinne M. Hohl, Marcel Émond, Lisa A. Calder, Christian Vaillancourt, Venkatesh Thirganasambandamoorthy, Howard Lesiuk, George A. Wells and Ian G. Stiell
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