1 Department of Neurology, Kunshan Hospital, Affiliated to Jiangsu University, Kunshan, PR China.
2 Department of Radiology, Affiliated Yancheng Hospital, School of Medicine, Southeast University, Yancheng, PR China.
3 Department of Radiology, Affiliated Yancheng Hospital, School of Medicine, Southeast University, Yancheng, PR China. Electronic address: ycjbhu@sina.com.