1. Department of Gastroenterology The First Affiliated Hospital of Zhengzhou University Zhengzhou Henan Province China
2. State Key Laboratory of Esophageal Cancer Prevention and Treatment Zhengzhou University Zhengzhou Henan Province China
3. The Second Affiliated Hospital of Harbin Medical University Harbin Heilongjiang Province China
4. The Lianjiang People's Hospital Lianjiang Guangdong Province China
5. Ruikang Hospital Affiliated to Guangxi University of Chinese Medicine Nanning Guangxi Zhuang Autonomous Region China