1. Department of Radiology, Interdisciplinary Ultrasound Department, University Hospital Regensburg, Regensburg, Germany
2. Institute of Biomaterial Science and Berlin-Brandenburg Centre for Regenerative Therapies, Helmholtz-Zentrum Geesthacht, Teltow, Germany
3. Department of Medical Ultrasound, Shanghai Tenth People’s Hospital, Ultrasound Research and Education Institute, Tongji University, School of Medicine, Shanghai, China