1. Department of Pathology, the First Affiliated Hospital of Sun Yat-sen University, Guangzhou, Province Guangdong, P.R. China
2. Gastrointestinal Surgery, the First Affiliated Hospital of Sun Yat-sen University, Guangzhou, Province Guangdong, P.R. China
3. Vascular and Thyroid Surgery, the First Affiliated Hospital of Sun Yat-sen University, Guangzhou, Province Guangdong, P.R. China
4. Department of Gastrointestinal Surgery, the Sixth Affliated Hospital of Sun Yat-Sen University, Guangzhou, Guangdong
5. Department of Molecular and Medical Pharmacology, University of California, Los Angeles, 570 Westwood Plaza, Los Angeles, CA USA