1. From the Department of Clinical Neurosciences (J.W.), Western General Hospital, Edinburgh, UK; the Department of Internal Medicine (E.B.), Ullevål University Hospital, Oslo, Norway; the Department of Molecular and Experimental Medicine (G.d.Z.), MEM 132, The Scripps Research Institute, La Jolla, Calif; and the Cerebrovascular Division (T.Y.), National Cardiovascular Center, Suita City, Osaka, Japan.