1. Department of Neurosurgery, The First Affiliated Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen, People's Republic of China
2. Department of Orthopedics, The First Affiliated Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen, People's Republic of China
3. The Third Clinical Medical College, The School of Clinical Medicine, Fujian Medical University, Fuzhou, Fujian, People's Republic of China
4. Division of Neurosurgery, Department of Surgery, Changhua Christian Hospital, Changhua, Taiwan
5. Department of Leisure Industry Management, National Chin-Yi University of Technology, Taichung, Taiwan
6. Department of Orthopedics, Zhangpu Country Hospital, Zhangzhou, People's Republic of China