1. Emory Vaccine Center, Emory University School of Medicine, Atlanta, Georgia, USA
2. Departments of Microbiology and Immunology, Emory University School of Medicine, Atlanta, Georgia, USA
3. Department of Immunology, St. Jude Children's Research Hospital, Memphis, Tennessee, USA
4. Departments of Pediatrics and Pathology, University of Washington School of Medicine, Seattle, Washington, USA
5. Ben Towne Center for Childhood Cancer Research, Seattle Children's Research Institute, Seattle, Washington, USA