1. Department of Radiation Oncology, The Fourth Hospital of Hebei Medical University, Shijiazhuang, Hebei 050035, P.R. China
2. Department of Breast Surgery, The Fourth Hospital of Hebei Medical University, Shijiazhuang, Hebei 050035, P.R. China
3. Department of Ultrasound, The Fourth Hospital of Hebei Medical University, Shijiazhuang, Hebei 050035, P.R. China