Qing Yong Zhu1, Hong Can Zhu2, Cheng Ru Song1. 1. From the Departments of Neurology (Q.Y.Z., H.C.Z.) and Magnetic Resonance Imaging (C.R.S), The First Affiliated Hospital of Zhengzhou University, China. 2. From the Departments of Neurology (Q.Y.Z., H.C.Z.) and Magnetic Resonance Imaging (C.R.S), The First Affiliated Hospital of Zhengzhou University, China. hcan_zhu@126.com.