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. Key Laboratory of Laboratory Medical Diagnostics, Chinese Ministry of Education, Chongqing Medical University, Chongqing 400016, P.R. China