1. Department of Oral Medicine, Beijing Stomatological Hospital, Capital Medical University, Beijing 100050, China
2. Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education/Beijing), Department of Gastrointestinal Oncology, Peking University Cancer Hospital & Institute, Beijing 100142, China
3. Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Capital Medical University, Beijing 100069, China
4. Department of Clinical Laboratory, Aerospace Center Hospital, Peking University, Beijing 100049, China