1. Ludwig Center for Cancer Genetics and Therapeutics and Howard Hughes Medical Institute, Johns Hopkins Kimmel Cancer Center, Baltimore, Maryland
2. Texas Children's Cancer Center and Departments of Pediatrics and Molecular and Human Genetics, Baylor College of Medicine, Houston, Texas
3. Department of Pathology, Netherlands Cancer Institute/Antoni van Leeuwenhoek Hospital Plesmanlaan 121, Amsterdam, The Netherlands
4. Department of Medicine, and Seidman Cancer Center at Case Western Reserve University and Case Medical Center of University Hospitals of Cleveland, Cleveland, Ohio
5. Department of Pathology, Pediatric Brain Tumor Foundation, and Preston Robert Tisch Brain Tumor Center at Duke University Medical Center, Durham, North Carolina
6. Department of Pathology, The Sol Goldman Pancreatic Cancer Research Center, Johns Hopkins Medical Institutions, Baltimore, Maryland
7. Division of Hematology and Oncology, Department of Internal Medicine, University of Michigan, Ann Arbor, Michigan
8. Division of Gastroenterology, Department of Internal Medicine, University of Virginia Health System, Charlottesville, Virginia