Jiqiao Yang1, Zhoukai Fu1, Liang Du2, Xiujing He3, Xiusong Li4, Jie Chen1. 1. Department of Breast Surgery, West China Hospital, Sichuan University, Chengdu, People's Republic of China. 2. Chinese Evidence-Based Medicine Center/West China Medical Publishers, West China Hospital, Sichuan University, Chengdu, People's Republic of China. 3. Clinical Research Center for Breast, West China Hospital, Sichuan University, Chengdu, People's Republic of China. 4. Department of Clinical Medicine, Fujian Medical University, Fuzhou, People's Republic of China.