1. Department of Orthopedics, Fourth People’s Hospital of Shaanxi, Xi'an, Shaanxi, China (mainland)
2. Outpatient Department, Jinling Hospital, Nanjing, Jiangsu, China (mainland)
3. Department of Orthopedics, Xijing Hospital, Xi’an, Shaanxi, China (mainland)
4. Department of Orthopedics, People’s Hospital of Shaanxi, Xi'an, Shaanxi, China (mainland)