1. Department of General Surgery, Zhujiang Hospital, Southern Medical University, Guangzhou, Guangdong, China (mainland)
2. Department of Mammary Gland Surgery, Zhongshan Hospital, Sun Yat-sen University, Zhongshan, Guangdong, China (mainland)
3. Department of Cardiovascular Medicine, Zhongshan Hospital, Sun Yat-sen University, Zhongshan, Guangdong, China (mainland)
4. Department of General Surgery, Zhujiang Hospital, Southern Medical University, Zhongshan, Guangdong, China (mainland)