1 Department of Pathology, Yantai Affiliated Hospital of Binzhou Medical University, Yantai, Shandong, China.
2 Department of Radiology, Yantai Affiliated Hospital of Binzhou Medical University, Yantai, Shandong, China.
3 Department of Gastroenterology, Yantai Affiliated Hospital of Binzhou Medical University, Yantai, Shandong, China. Electronic address: qhysunjiawei@163.com.