1. Department of Gastroenterology, the Second Affiliated Hospital, Hengyang Medical School, University of South China, Hengyang, China
2. Department of Clinical Laboratory, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, China
3. Clinical Research Center, the Second Affiliated Hospital, Hengyang Medical School, University of South China, Hengyang, China
4. The Key Laboratory of Molecular Diagnosis and Precision Medicine in Hengyang, Hengyang, China
5. The Clinical Research Center for Gastric Cancer in Hunan Province, Hengyang, China