1. Department of Neurosurgery, Xiangya Hospital, Central South University, Changsha 410008, China
2. The Institute of Skull Base Surgery and Neurooncology at Hunan Province, 410008, China
3. Texas Children's Cancer Center, Department of Pediatrics, Dan L. Duncan Cancer Center, Baylor College of Medicine, Houston, Texas 77030, USA
4. Department of Microbiology, Peking University Health Science Center, Beijing 100191, China
5. Department of Ophthalmology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai 200072, P. R. China