1. Children's Hospital of Philadelphia and Department of Pediatrics, University of Pennsylvania School of Medicine, Philadelphia, PA
2. Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, MD
3. Department of Cell Biology, Johns Hopkins University School of Medicine, Baltimore, MD
4. Department of Biochemistry and Molecular Biology, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD
5. Bloomberg-Kimmel Institute for Cancer Immunotherapy, Johns Hopkins University, Baltimore, MD
6. Ludwig Institute for Cancer Research, New York, NY