1. From the Center for Cerebrovascular Disease, Department of Medicine, Division of Neurology (C.D.B., L.B.G.), Duke University Medical Center; the Department of Medicine (J.L.), Duke University Medical Center; the Division of Physical Therapy, Department of Community and Family Medicine (P.W.D.), Duke University Medical Center and Center for Clinical Health Policy Research; and the Department of Medicine, Division of Cardiology (L.K.N.), Duke Clinical Research Institute, Durham, NC.