1. Division of Neurology, Department of Medicine, Sunnybrook Health Sciences Centre, University of Toronto, Ontario, Canada (R.S., A.S.P.L.).
2. Rush Alzheimer Disease Center (L.Y., J.A.S., D.A.B., A.S.B.), Rush University, Chicago, IL.
3. Department of Pathology (J.A.S.), Rush University, Chicago, IL.