1. Department of Gastroenterology General Hospital of Northern Theater Command (formerly General Hospital of Shenyang Military Area) Shenyang China
2. Postgraduate College Jinzhou Medical University Jinzhou China
3. Postgraduate College China Medical University Shenyang China
4. Department of Clinical and Translational Hepatology The Liver Institute, Center of Excellence in GI Sciences, Rajagiri Hospital Aluva Kerala India
5. Faculdade de Medicina de Botucatu UNESP, Campus de Botucatu Botucatu Brazil