1. Department of Neurosurgery, The 452 Hospital of Western Air Force, Chengdu, Sichuan 610021, P.R. China
2. The Brain Research Laboratory of The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu 215006, P.R. China
3. Department of Neurosurgery, The 411 Hospital of the People's Liberation Army, Shanghai 200081, P.R. China
4. Department of Neurosurgery, Changzheng Hospital, The Second Military Medical University, Shanghai 200003, P.R. China
5. Department of Nutrition, The 452 Hospital of Western Air Force, Chengdu, Sichuan 610021, P.R. China
6. Department of Urology, The 452 Hospital of Western Air Force, Chengdu, Sichuan 610021, P.R. China
7. The Eastern Hepatobiliary Surgery Hospital, The Second Military Medical University, Shanghai 200438, P.R. China
8. Department of Neurosurgery, General Hospital of Jinan Military Command, Jinan, Shandong 250031, P.R. China