1. Key Laboratory of Brain–Machine Intelligence Technology, Ministry of Education, Nanjing University of Aeronautics and Astronautics, Nanjing, China
2. Department of Ultrasound, Affiliated Drum Tower Hospital, Nanjing University Medical School, Nanjing, China
3. Department of Orthopaedic Surgery, Children’s Hospital of Nanjing Medical University, Nanjing, China
4. Department of Biomedical Engineering, Tsinghua University, Beijing, China