1. Department of Radiology, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China
2. Department of Radiology, Yuhuangding Hospital, Qingdao University School of Medicine, Yantai, China
3. Department of Radiology, Yaitai Shan Hospital, Yantai, China
4. Center for Big Data Research in Health and Medicine, The First Affilicated Hospital of Shandong First Medical University, Jinan, China