1. Drexel University College of Medicine, Philadelphia, PA, USA
2. Department of Orthopaedics and Rehabilitation, Yale School of Medicine, New Haven, CT, USA
3. Department of Pathology, University of Michigan, Ann Arbor, MI, USA
4. Department of Radiology and Biomedical Imaging, Yale School of Medicine, New Haven, CT, USA
5. Department of Pathology, Yale School of Medicine, New Haven, CT, USA
6. Department of Pathology, University of Lausanne, Lausanne, Switzerland