Guoping Peng1, Bo Wang2, Benyan Luo3. 1. Department of Neurology, First Affiliated Hospital, Zhejiang University, Hangzhou, Zhejiang 310003, China. 2. Department of Pathology, First Affiliated Hospital, Zhejiang University, Hangzhou, Zhejiang 310003, China. 3. Department of Neurology, First Affiliated Hospital, Zhejiang University, Hangzhou, Zhejiang 310003, China. Email: luobenyan@zju.edu.cn.