1. Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education/Beijing), Department of Cancer Epidemiology, Peking University Cancer Hospital & Institute, Beijing, China
2. PYLOTUM Key Joint Laboratory for Upper GI Cancer, Technische Universität München, Munich, Germany, and Peking University Cancer Hospital & Institute, Beijing, China
3. Institute for Medical Microbiology, Immunology and Hygiene, Technische Universität München, Munich, Germany
4. German Center for Infection Research, Partner Site Munich, Munich, Germany
5. Institute of Pathology, Klinikum Bayreuth, Bayreuth, Germany
6. Linqu Public Health Bureau, Linqu, Shandong, China