1. Department of Orthopedics, The First Affiliated Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen 361000, China
2. The School of Clinical Medicine, Fujian Medical University, Fuzhou 350122, China
3. Division of Neurosurgery, Department of Surgery, Changhua Christian Hospital, Changhua 500209, Taiwan
4. Department of Leisure Industry Management, National Chin-Yi University of Technology, Taichung 41170, Taiwan