[1] Capital Med Univ, Xuanwu Hosp, Dept Emergency, Beijing, Peoples R China
[2] Capital Med Univ, Xuanwu Hosp, Dept Neurol & Intracranial Hypertens, Natl Hlth Commiss Peoples Republ China, Beijing, Peoples R China
[3] Capital Med Univ, Xuanwu Hosp, Cerebral Venous Dis Ctr, Natl Hlth Commiss Peoples Republ China, Beijing, Peoples R China