1. Department of Breast Surgery, Shanxi Provincial Cancer Hospital, Shanxi Medical University, Taiyuan, Shanxi 030013, P.R. China
2. Department of Breast Surgery, Beijing Chaoyang Hospital, The Affiliated Hospital of Capital Medical University, Beijing 100020, P.R. China
3. Department of Hepatobiliary Surgery, Beijing Chaoyang Hospital, The Affiliated Hospital of Capital Medical University, Beijing 100020, P.R. China