1. Department of Neurology, People's Hospital of Linyi Affiliated to Qingdao University, Linyi, Shandong 276000, P.R. China
2. Department of Biochemistry, Basic Medical School, Taishan Medical University, Taian, Shandong 271000, P.R. China
3. Department of Food Science and Technology, School of Food and Pharmaceutical Engineering, Zhaoqing University, Zhaoqing, Guangdong 526061, P.R. China