1. Department of Orthopaedics, Second Affiliated Hospital of Xi’an Jiaotong University, Xi’an, Shaanxi, China (mainland)
2. Department of Education, Second Affiliated Hospital of Xi’an Jiaotong University, Xi’an, Shaanxi, China (mainland)
3. Department of Orthopaedics, Xi’an Fourth People’s Hospital, Xi’an, Shaanxi, China (mainland)