1. 1Division of Infectious Diseases, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina;
2. 2Department of Microbiology and Parasitology, Universidad Nacional Autónoma de Nicaragua-León, Nicaragua;
3. 3The Hope Clinic of the Emory Vaccine Center, Division of Infectious Diseases, Emory University School of Medicine, Decatur, Georgia;
4. 4Division of Molecular Medicine and Virology, Department of Clinical and Biomedical Sciences, Linköping University, Linköping, Sweden;
5. 5Department of Biostatistics, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina;
6. 6Department of Microbiology and Immunology, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina;
7. 7School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina;
8. 8College of Osteopathic Medicine, Kansas City University, Kansas City, Missouri;
9. 9Department of Family Medicine, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina;
10. 10Department of Epidemiology, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina