[1] Jining Med Coll, Affiliated Hosp, Dept Neurol, 89 Guhuai Rd, Jining 272000, Peoples R China
[2] Qingdao Univ, Affiliated Hosp, Dept Resp & Crit Care Med, 16 Jiangsu Rd, Qingdao 266003, Shandong, Peoples R China
[3] Shandong Univ, Qilu Hosp, Dept Neurol, 107 Wenhua West Rd, Jinan 250012, Shandong, Peoples R China
[4] Capital Med Univ, Beijing Friendship Hosp, Dept Neurol, 95 Yongan Rd, Beijing 100050, Peoples R China
[5] Qingdao Univ, Affiliated Hosp, Dept Neurol, 16 Jiangsu Rd, Qingdao 266003, Shandong, Peoples R China
[6] Peking Univ, Hosp 1, Dept Neurol, 8 Xishiku St, Beijing 100034, Peoples R China
[7] Capital Med Univ, Xuanwu Hosp, Dept Neurol, 45 Changchun St, Beijing 100053, Peoples R China