1. Department of Orthopedic Surgery Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College Beijing China
2. Department of Orthopedic Surgery The First Hospital of Harbin City Harbin Heilongjiang China
3. Department of Orthopedics Beijing Hospital of Traditional Chinese Medicine Beijing China
4. Department of Orthopedics Surgery, Renji Hospital, School of Medicine Shanghai Jiao Tong University Shanghai China