1. Department of Ultrasound China‐Japan Union Hospital of Jilin University Changchun Jilin China
2. Department of Ultrasound Qingdao Municipal Hospital Qingdao China
3. Department of Ultrasound The second Affiliated Hospital Zhejiang University School of Medicine Hangzhou Zhejiang China
4. Department of Anesthesia China‐Japan Union Hospital of Jilin University Changchun China