1. Research Unit of Medical Imaging, Physics and Technology University of Oulu Oulu Finland
2. Medical Research Center University of Oulu and Oulu University Hospital Oulu Finland
3. Department of Medical Imaging Central Finland Central Hospital Jyväskylä Finland
4. Department of Regenerative Medicine State Research Institute Centre for Innovative Medicine Vilnius Lithuania
5. Departments of Orthopedics, Rheumatology and Clinical Immunology University Medical Center Utrecht Utrecht The Netherlands
6. Department of Joint Surgery The First Affiliated Hospital, Sun Yat‐sen University Guangzhou Guangdong China
7. Department of Diagnostic Radiology Oulu University Hospital Oulu Finland