1. Department of Imaging and Interventional Radiology, The Chinese University of Hong Kong, Hong Kong, China
2. Department of Orthopaedic and Traumatology, The Chinese University of Hong Kong, Hong Kong, China
3. Department of Orthopaedic Surgery, University Medical Centre Rostock, Rostock, Germany
4. Institute of Diagnostic and Interventional Radiology, Pediatric Radiology and Neuroradiology, University Medical Center Rostock Germany