1. Department of Ultrasound, Xinqiao Hospital of the Third Military Medical University, 183 Xinqiaozheng Road, Chongqing 400037, China
2. Department of Ultrasound, The Forty-Fourth Military Hospital, 67 Huanghe Road, Guiyang 550009, China
3. Department of Orthopaedics, The Affiliated Hospital of Guiyang Medical College, 28 Guiyi Street, Guiyang 550004, China
4. Center for Tissue Engineering and Stem Cells, Guiyang Medical College, 9 Beijing Road, Guiyang 550004, China