1. Henan Key Laboratory of Microbiome and Esophageal Cancer Prevention and Treatment; Henan Key Laboratory of Cancer Epigenetics, Cancer Hospital, The First Affiliated Hospital (College of Clinical Medicine) of Henan University of Science and Technology, Jianxi, Luoyang, Henan 471003, P.R. China
2. Department of Otolaryngology, The First Affiliated Hospital of Henan University of Science and Technology, Luoyang, Henan 471003, P.R. China
3. Department of Pathology, Luoyang Central Hospital Affiliated to Zhengzhou University, Luoyang, Henan 471003, P.R. China