[1] Chongqing Med Univ, Affiliated Hosp 1, Dept Neurosurg, 1 Youyi Rd, Chongqing 400016, Peoples R China
[2] Nanchong Cent Hosp, Clin Med Coll North Sichuan Med Coll 2, Dept Neurosurg, Nanchong, Peoples R China
[3] Chengdu Integrated TCM & Western Med Hosp, Dept Neurosurg, Chengdu, Peoples R China
[4] Suining Cent Hosp, Dept Neurosurg, Suining, Peoples R China
[5] Chongqing Univ Canc Hosp, Dept Neurooncol, Chongqing, Peoples R China
[6] Affiliated Hosp, North Sichuan Med Coll, Dept Neurosurg, Nanchong, Peoples R China