[1] Harbin Med Univ, Dept Neurosurg, Affiliated Hosp 2, Harbin 150086, Peoples R China
[2] Tianjin Med Univ, Gen Hosp, Dept Neurosurg, Lab Neurooncol,Tianjin Neurol Inst, Tianjin 300060, Peoples R China
[3] Minist Educ, Key Lab Neurotrauma Variat & Regenerat, Tianjin 300060, Peoples R China
[4] Tianjin Municipal Govt, Tianjin 300060, Peoples R China
[5] Capital Med Univ, Tiantan Hosp, Dept Neurosurg, Beijing 100050, Peoples R China