1. Department of Endocrine and Breast Surgery, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, P.R. China
2. Department of Breast Surgery, The People's Hospital of Deyang, Deyang, Sichuan 618000, P.R. China
3. Department of The Second of Gynecologic Oncology, Shaanxi Provincial Tumor Hospital, The Affiliated Hospital of Medical College of Xi'an JiaoTong University, Xi'an, Shaanxi 710061, P.R. China
4. Department of Breast Surgery, Dianjiang People's Hospital of Chongqing, Dianjiang, Chongqing 408300, P.R. China