1 Institute of Organ Transplantation, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.
2 Department of Neurosurgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.
3 Department of Traditional Chinese Orthopedics & Traumatology, The Second People's Hospital of Xichuan County, Xichuan, Nanyang, China.
4 Department of Medical Administration, The Second People's Hospital of Xichuan County, Xichuan, Nanyang, China.
5 Department of Neurosurgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China. songshanchai@163.com.