1. Second Department of Breast Surgery, Guangxi Medical University Affiliated Tumor Hospital, Nanning, Guangxi 530021, P.R. China
2. Second Department of Breast and Thyroid Surgery, Liuzhou People's Hospital, Liuzhou, Guangxi 545006, P.R. China
3. First Department of Breast and Thyroid Surgery, Liuzhou People's Hospital, Liuzhou, Guangxi 545006, P.R. China