1. Department of Orthopaedics, Henan Provincial People’s Hospital, People’s Hospital of Zhengzhou University, School of Clinical Medicine, Henan University, Zhengzhou, Henan, China
2. Department of Ophthalmology, Kaifeng Central Hospital, Kaifeng, Henan, China
3. Henan Provincial People’s Hospital, Henan University People’s Hospital, Zhengzhou, Henan, China
4. Henan Provincial People’s Hospital, Zhengzhou University People’s Hospital, Zhengzhou, Henan, China
5. Department of Neurosurgery, The Fourth Medical Center of Chinese PLA General Hospital, Beijing, China