1. Department of Microbiology and Parasitology, National Autonomous University of Nicaragua–León , Nicaragua
2. Division of Molecular Medicine and Virology, Linköping University , Sweden
3. Department of Epidemiology
4. Division of Infectious Diseases, University of North Carolina at Chapel Hill
5. Centers for Disease Control and Prevention , Atlanta, Georgia
6. Department of Family Medicine, University of North Carolina at Chapel Hill
7. Division of Medicine, Karolinska Institute , Stockholm , Sweden