1. Department of Breast Surgery, The First Affiliated Hospital of Xi’an Jiaotong University, Xi’an, P.R. China
2. Department of Cancer Epidemiology, Cancer Institute & Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, P.R. China
3. Department of Epidemiology, West China School of Public Health, Sichuan University, Chengdu, Sichuan, P.R. China
4. Department of Breast Surgery, Zhejiang Cancer Hospital, Hangzhou, P.R. China
5. Department of Breast Oncology, Sun Yat-Sen University Cancer Center, Guangzhou, P.R. China
6. Department of Breast-thyroid Surgery, Xiangya Second Hospital, Central South University, Changsha, P.R. China
7. Department of Breast Surgery, Liaoning Cancer Hospital, Shenyang, P.R. China
8. Center of Breast Disease, Cancer Institute & Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, P.R. China
9. Department of Pathology, Cancer Institute & Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, P.R. China