1. Division of Medical Genetics, Department of Medicine, University of Washington, Seattle, WA;
2. Institute for Virology and Microbiology, University Witten/Herdecke, Witten, Germany;
3. Mobile DNA Group, Max-Delbrück Center for Molecular Medicine, Berlin, Germany;
4. Department of Molecular Medicine, The Mayo Clinic, Rochester, MN;
5. Molecular Cell Biology and Gene Therapy Group, Institute of Biology, Humboldt University, Berlin, Germany;
6. Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX;
7. Clinical Research Division, Fred Hutchinson Cancer Research Center, Seattle, WA;
8. Division of Hematology, Department of Medicine, and
9. Department of Pathology, University of Washington, Seattle, WA