1. Department of Ultrasound in Medicine, Second Affiliated Hospital, Zhejiang University College of Medicine, Hangzhou City, Zhejiang Province, China;
2. Department of Surgery, Second Affiliated Hospital, Zhejiang University College of Medicine, Hangzhou City, Zhejiang Province, China;
3. Department of Pathology, Second Affiliated Hospital, Zhejiang University College of Medicine, Hangzhou City, Zhejiang Province, China