1. From the Departments of Neurology (N.L., Y.F.L., Y.L.W., Y.J.W., X.Q.Z.) and Neuroradiology (L.M., Y.P.G.), Beijing Tiantan Hospital, Capital Medical University, Beijing, China; the Departments of Neurology (N.L., H.W., R.D., K.W.) and Interventional and Diagnostic Neuroradiology (P.R.), Hannover Medical School, Hannover, Germany; and the Center for Systems Neuroscience (ZSN), Hannover, Germany (N.L., R.D., K.W.).