1. Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, MD 21231, USA.
2. Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, MD 21231, USA.
3. Department of Radiology, Johns Hopkins University School of Medicine, Baltimore, MD 21231, USA.
4. Department of Pathology, Johns Hopkins University School of Medicine, Baltimore, MD 21231, USA.
5. Department of Orthopedic Surgery, Johns Hopkins University School of Medicine, Baltimore, MD 21231, USA.
6. Department of Molecular and Comparative Pathobiology, Johns Hopkins University School of Medicine, Baltimore, MD 21231, USA.