1. 1Children's Medical Center Research Institute, University of Texas Southwestern Medical Center, Dallas, Texas.
2. 2Department of Pediatrics, Harold C. Simmons Comprehensive Cancer Center, and Hamon Center for Regenerative Science and Medicine, University of Texas Southwestern Medical Center, Dallas, Texas.
3. 3Cecil H. and Ida Green Center for Reproductive Biology Sciences, Department of Obstetrics and Gynecology, and Department of Biophysics, University of Texas Southwestern Medical Center, Dallas, Texas.
4. 4Department of Pathology, University of Texas Southwestern Medical Center, Dallas, Texas.
5. 5Department of Internal Medicine, University of Texas Southwestern Medical Center, Dallas, Texas.
6. 6Division of Hematology, Department of Internal Medicine, The Ohio State University Comprehensive Cancer Center, Columbus, Ohio.
7. 7Division of Hematology and Medical Oncology, Department of Medicine, Oregon Health and Science University, Portland, Oregon.
8. 8The Leukemia & Lymphoma Society, Rye Brook, New York.
9. 9Leukemia Service, Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, New York.
10. 10Department of Hematopathology, The University of Texas MD Anderson Cancer Center, Houston, Texas.
11. 11Howard Hughes Medical Institute, University of Texas Southwestern Medical Center, Dallas, Texas.