1. Department of Internal Medicine, Saint Louis University , St Louis, Missouri , USA
2. Department of Internal Medicine, University of Iowa , Iowa City, Iowa , USA
3. Duke University School of Medicine , Durham, North Carolina , USA
4. Department of Medicine, Emory University School of Medicine , Atlanta, Georgia , USA
5. Vanderbilt Vaccine Research Program, Department of Pediatrics, Vanderbilt University Medical Center , Nashville, Tennessee , USA
6. Baylor College of Medicine , Human Vaccine Institute, Houston, Texas , USA
7. Kaiser Permanente Washington Health Research Institute , Seattle, Washington , USA
8. Division of Microbiology and Infectious Diseases, National Institute of Allergy and Infectious Diseases , Bethesda, Maryland , USA
9. Department of Pathology, Division of Clinical Pathology, Saint Louis University School of Medicine , St Louis, Missouri , USA