1. Department of Orthopaedics, Tangdu Hospital, Fourth Military Medical University, Xi'an, Shaanxi, China.
2. Department of Product Research and Development, Wedo (Xian) Bio-Medical Technology Co., Ltd., Xi'an, Shaanxi, China.
3. Department of Orthopaedics, The 63750 Hospital of People's Liberation Army, Xi'an, Shaanxi, China.