1. Oregon Stem Cell Center, Department of Pediatrics, Oregon Health & Science University, Portland, OR;
2. Department of Pathology, University of Washington, Seattle, WA;
3. Department of Pathology, Baylor College of Medicine, TX;
4. Department of Molecular and Medical Genetics, Oregon Health & Science University, Portland, OR;
5. Department of Pathology, Texas Children's Hospital, Houston, TX; and
6. Department of Genome Sciences, University of Washington, Seattle, WA