G-Q Qian1, F-Y Yin2, G-X Li1, J-G Chu3. 1. From the Department of General Internal Medicine, Ningbo No. 1 Hospital, Ningbo, China. 2. Department of Ultrasound, Ningbo No.1 Hospital, Ningbo, China. 3. From the Department of General Internal Medicine, Ningbo No. 1 Hospital, Ningbo, China 845094800@qq.com.