Affiliation: | 1. Institute of Digestive Diseases, Fourth Military Medical University, Xian, People''s Republic of China;2. Department of Anatomical & Cellular Pathology, The Chinese University of Hong Kong, Hong Kong, SAR, People''s Republic of China;3. Hong Kong Cancer Institute, The Chinese University of Hong Kong, Hong Kong, SAR, People''s Republic of China;4. Department of Surgery, The Chinese University of Hong Kong, Hong Kong, SAR, People''s Republic of China |