1. Department of Neurosurgery; Tangdu Hospital; Fourth Military Medical University; Xi'an China
2. Department of Neurology; Beth Israel Deaconess Medical Center; Harvard medical school; Boston MA USA
3. Department of Neurosurgery; The 463rd Hospital of PLA; Shenyang China
4. Department of Urology surgery; Xijing Hospital; Fourth Military Medical University; Xi'an China
5. Department of Neurosurgery; General Hospital of Shenyang Military Area Command; Shenyang China