| Affiliation: | 1. Department of Joint Surgery, the First Affiliated Hospital, Sun Yat-sen University, Guangzhou, Guangdong 510080 China;2. Research Unit of Medical Imaging, Physics and Technology, Faculty of Medicine, University of Oulu, PO Box 5000, FI-90014 Oulu, Finland;3. Department of Regenerative Medicine, State Research Institute Centre for Innovative Medicine, LT-08406, Vilnius, Lithuania;4. Departments of Orthopedics, Rheumatology and Clinical Immunology, University Medical Center Utrecht, 508 GA, Utrecht, The Netherlands |
