1. Division of Transfusion Medicine Department of Pathology Johns Hopkins University Baltimore MD USA
2. Department of Epidemiology Johns Hopkins Bloomberg School of Public Health Baltimore MD USA
3. Department of Molecular Microbiology and Immunology Johns Hopkins Bloomberg School of Public Health Baltimore MD USA
4. Mississippi Valley Regional Blood Center Springfield IL USA
5. Department of Pathology and Immunology Washington University School of Medicine in St. Louis St. Louis MO USA
6. Department of Laboratory Medicine and Pathology Mayo Clinic Rochester MN USA
7. Division of Intramural Research National Institute of Allergy and Infectious Diseases National Institutes of Health Baltimore MD USA
8. Department of Infectious Diseases Johns Hopkins University School of Medicine Baltimore MD USA