1. Department of Abdominal Ultrasound, The Affiliated Hospital of Qingdao University, Qingdao, China
2. Department of Ultrasound, West China Hospital of Sichuan University, Chengdu, China
3. School of Computer Science, Sichuan University, Chengdu, China
4. Research Institute of Pathology, West China Hospital Sichuan University, Chengdu, China
5. Neurology Department, The Affiliated Hospital of Qingdao University, Qingdao, China