1. Department of Radiology, Leiden University Medical Center, Leiden, Netherlands
2. Department of Pathology, Leiden University Medical Center, Leiden, Netherlands
3. Department of Pathology, University Medical Center Groningen, Groningen, Netherlands
4. Department of Orthopedics, Leiden University Medical Center, Leiden, Netherlands
5. Department of Medical Oncology, Leiden University Medical Center, Leiden, Netherlands