1. From the Department of Pharmaceutical Sciences (A.M.S.H., B.B., E.L.B.S., A.W.) and the Brain Barriers Research Center (A.M.S.H., B.B., E.L.B.S., A.W.), College of Pharmacy, University of Minnesota, Minneapolis, MN; the Departments of Neurology (S.B., R.B., I.M., U.B., F.S.) and Psychiatry (G.S.), University of Regensburg, Bezirksklinikum Regensburg, Germany; and the Center for Neuroradiology (H.H.K.), Bezirksklinikum, Regensburg University Medical Center, Bezirksklinikum Regensburg, Germany.