Institution: | 1. Department of Ultrasound, Shengjing Hospital of China Medical University, , Shenyang, Liaoning, 110004 China;2. Department of Ultrasound, Hongqi Hospital of Mudanjiang Medical University, , Mudanjiang, Heilongjiang, 157011 China;3. Department of Pathology, MuDanJiang Medical University, , Mudanjiang, Heilongjiang, 157011 China |