[1]Second Mil Med Univ, Changzheng Hosp, Dept Neurosurg, Shanghai 200003, Peoples R China.
[2]Second Mil Med Univ, Changzheng Hosp, Dept Otolaryngol, Shanghai 200003, Peoples R China.
[3]Fudan Univ, Huadong Hosp, Dept Neurol, Shanghai 200040, Peoples R China.
[4]Shanghai Jiao Tong Univ, Sch Med, Ren Ji Hosp, Dept Cardiol, Shanghai 200127, Peoples R China.