1. Department of Ultrasound, Zhejiang Provincial People’s Hospital, People’s Hospital of Hangzhou Medical College, Hangzhou, Zhejiang, China
2. Graduate Department, Bengbu Medical College, Bengbu, Anhui, China
3. Department of Gastroenterology, Nanxun People’s Hospital (Zhejiang Provincial People’s Hospital Nanxun Branch), Huzhou, Zhejiang, China
4. Key Laboratory of Gastroenterology of Zhejiang Province, Zhejiang Provincial People’s Hospital, People’s Hospital of Hangzhou Medical College, Hangzhou, Zhejiang, China