1. Center of Cerebrovascular Disease; No. 404 Hospital of PLA; 8 Baoquan Street; Weihai 264200; China
2. Diagnostic Medicine of Hujiamiao Community Hospital; 257 North Jinhua Road; Xincheng District; Xi'an 710015; China
3. Department of Chemical Defense; School of Preventive Medicine; The Third Military Medical University; 30 Gantanyan Street; Shapingba District; Chongqing 400038; China