1. Department of Orthopaedics, Lanzhou University Second Hospital, Lanzhou, Gansu, 730030, China
2. Key Laboratory of Bone & Joint Disease Research of Gansu Provincial, Lanzhou, Gansu, 730030, China
3. Department of Spine Surgery, Honghui Hospital, Xi'an Jiaotong University, Xi'an, Shaanxi, 710000, China