1. Department of Orthopaedics, Second Affiliated Hospital of Xi’an Jiaotong University, Xi’an, Shaanxi, China (mainland)
2. Department of Orthopaedics, Honghui Hospital, Xi’an, Shaanxi, China (mainland)
3. Department of Orthopaedics, Tangdu Hospital, Xi’an, Shaanxi, China (mainland)
4. Department of Orthopaedics, Affiliated Hospital of Shaanxi University of Traditional Chinese Medicine, Xi’an, Shaanxi, China (mainland)