1. Department of Orthopedics, China-Japan Union Hospital of Jilin University, Changchun, Jilin Province, P. R. China
2. Department of Breast Surgery, China-Japan Union Hospital of Jilin University, Changchun, Jilin Province, P. R. China
3. Department of Ultrasound, China-Japan Union Hospital of Jilin University, Changchun, Jilin Province, P. R. China