1. Clinical Laboratory, Zhongshan Hospital Qingpu Branch, Fudan University, Shanghai, China
2. Pathology Department, International Peace Maternity and Child Health Hospital of China Welfare Institution, Shanghai, China
3. State Key Laboratory of Oncogenes and Related Genes, Shanghai Cancer Institute, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, P.R. China
4. Department of Gastrointestinal Surgery, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, P.R. China