1. From the Department of Neurology (Q.J., X.Z., C.W., Y.W., H.L., L.L., H.Z., Y.Z., Y.W.), Beijing Tiantan Hospital, Capital Medical University, Beijing, China; Department of Epidemiology (Y.Y.), University of North Carolina, Chapel Hill, NC; and Department of Medical Endocrinology (L.Z.), Beijing Tiantan Hospital, Capital Medical University, Beijing, China.