1. Assistant Researcher, Department of Clinical Research Management, West China Hospital of Sichuan University, Chengdu, Sichuan, China
2. Research Assistant, Department of Clinical Research Management, West China Hospital of Sichuan University, Chengdu, Sichuan, China
3. Associate chief physician and Head, Department of Endoscopy, People's Hospital of Wanning, Wanning, Hainan, China
4. Supervisor nurse,Department of Endoscopy, People's Hospital of Wanning, Wanning, Hainan, China
5. Associate chief physician and Head, Department of Pathology, People's Hospital of Wanning, Wanning, Hainan, China