1. Puget Sound Blood Center Research Institute, Seattle, WA;
2. GE Health Sciences, Portland, OR;
3. Aflac Cancer and Blood Disorders Center, Department of Pediatrics, Emory University, Atlanta, GA;
4. Division of Hematology, University of Washington, Seattle, WA; and
5. Department of Medicine, Uniformed Services University of the Health Sciences, Bethesda, MD