1. Department of Digestive Surgery, Xijing Hospital, Fourth Military Medical University, Xi’an, Shaanxi Province, China
2. State Key Laboratory of Cancer Biology and National Clinical Research Center for Digestive Diseases, Xijing Hospital of Digestive Diseases, Fourth Military Medical University, Xi’an, Shaanxi Province, China
3. Department of Thyroid and Breast Surgery, Xi’an No.3 Hospital, the Affiliated Hospital of Northwest University, Xi’an, Shaanxi Province, China
4. Department of Histology and Embryology, School of Basic Medicine, Xi’an Medical University, Xi’an, Shaanxi Province, China
5. Department of Otolaryngology, Xijing Hospital, Fourth Military Medical University, Xi’an, Shaanxi Province, China