1. Department of Gastroenterology, Tongji Hospital, Tongji University School of Medicine, Shanghai 20065, China
2. Department of Gastroenterology, the Tenth People's Hospital of Shanghai, Tongji University School of Medicine, Shanghai 200072, China
3. Department of Private Ward, Tongji Hospital, Tongji University School of Medicine, Shanghai 200065, China
4. Department of Clinic Nutrition, Tongji Hospital, Tongji University School of Medicine, Shanghai 200065, China