Affiliation: | 1. Department of Internal Medicine, Aviation Medical Evaluation and Training Center of Airforce in Hangzhou, , Hangzhou, China;2. Key Laboratory of Biotherapy of Zhejiang Province, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, , Hangzhou, China;3. Department of Colorectal Surgery, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, , Hangzhou, China;4. Email:drhechao@yahoo. com.cn |