1. Department of Transplantation Biology, Fred Hutchinson Cancer Research Center, Seattle, WA 98109-1024.
2. Genome Center, University of Washington, Seattle, WA 98195-2145.
3. Department of Pediatrics, Oregon Health and Science University, Portland, OR 97239-3098.
4. Department of Hematology, University of Washington, Seattle, WA 98195-7710.