Combining Computed Tomography Perfusion and Baseline National Institutes of Health Stroke Scale to Assess the Clinical Penumbra in Ischemic Stroke - Umberto Pensato; Alexander Stebner; Salome Bosshart; Ruchir Shah; Axel Rohr; Ricardo Hanel; Michael E. Kelly; Aditya Bharatha; Michael D. Hill; Mayank Goyal; Andrew M. Demchuk; Johanna M. Ospel (Journal of Stroke)