1. Department of Gastroenterology, Second Hospital of Shanxi Medical University, Taiyuan, Shanxi, China
2. Shanxi Province Key Laboratory of Oral Diseases Prevention and New Materials, Shanxi Medical University School and Hospital of Stomatology, Taiyuan, Shanxi, China
3. Department of Gastroenterology, Division of Gastroenterology, Shengjing Hospital of China Medical University, Shenyang, Liaoning, China
4. Institute of Biomedical Research, Shanxi Medical University, Taiyuan, Shanxi, China