Harbin Medical University, Cancer Hospital, Department of Gastrointestinal Oncology, Harbin Medical University, Cancer Hospital, Department of Gastrointestinal Oncology, Harbin Medical University, Harbin Medical University, Harbin Medical University, Cancer Hospital, Department of Gastrointestinal Oncology, Harbin Medical University, Cancer Hospital, Department of Gastrointestinal Oncology, Harbin Medical University, Cancer Hospital, Department of Gastrointestinal Oncology, Harbin Medical University, Harbin Medical University, Cancer Hospital, Department of Gastrointestinal Oncology and Sun Yat-sen University (SYSU) - State Key Laboratory of Oncology in South China