1. Department of Gastroenterology and Hepatology, General Hospital Tianjin Medical University Tianjin China
2. Department of Gastroenterology, Sir Run Run Shaw Hospital, School of Medicine Zhejiang University Hangzhou China
3. Department of Maxillofacial and Otorhinolaryngological Oncology, Tianjin Medical University Cancer Institute and Hospital, Key Laboratory of Cancer Prevention and Therapy, Tianjin Cancer Institute National Clinical Research Center of Cancer Tianjin China
4. Department of Pathology, General Hospital Tianjin Medical University Tianjin China