1. Department of Internal Medicine II, University Hospital Würzburg, Würzburg, Germany;
2. Department of Cellular Therapy and Allogeneic Stem Cell Transplantation, Karolinska University Hospital Huddinge, Stockholm, Sweden;
3. Department of Medicine Huddinge, Karolinska Institutet, Stockholm, Sweden;
4. Vaccine and Infectious Disease Division and
5. Clinical Research Division, Fred Hutchinson Cancer Research Center, Seattle, WA, and
6. Department of Medicine, University of Washington, Seattle, WA