1. Group Brain Vasculature and Perivascular Niche, Division of Experimental and Translational Neuroscience, Krembil Brain Institute, Krembil Research Institute, Toronto Western Hospital, University Health Network, University of Toronto, Ontario, Canada (T.W., F.F.).
2. Division of Neurosurgery, Department of Surgery, Toronto Western Hospital, University Health Network, University of Toronto, Ontario, Canada (T.W., F.F.).
3. Group of CNS Angiogenesis and Neurovascular Link, Neuroscience Center Zurich, and Division of Neurosurgery, University and University Hospital Zurich, and Swiss Federal Institute of Technology (ETH) Zurich, Switzerland (T.W., F.F.).
4. Division of Neurosurgery, University Hospital Zurich, Switzerland (T.W., F.F.).
5. Department of Physiology, Faculty of Medicine (F.F.), University of Toronto, Ontario, Canada.
6. Department of Laboratory Medicine and Pathobiology, Faculty of Medicine (J.E.F.), University of Toronto, Ontario, Canada.
7. Toronto General Hospital Research Institute (J.E.F.), University Health Network, Ontario, Canada.
8. Peter Munk Cardiac Centre (J.E.F.), University Health Network, Ontario, Canada.