1. National Travel Health Network and Centre, London, England
2. Department of Infectious and Tropical Diseases, London School of Hygiene and Tropical Medicine, London, England
3. Department of Internal Medicine, Clinical Infectious Diseases, University of Texas Medical School at Houston, Houston, Texas
4. Department of Medicine, Division of Infectious Diseases and International Health, University of Virginia School of Medicine, Charlottesville, Virginia
5. Department of Pathology, Division of Infectious Diseases and International Health, University of Virginia School of Medicine, Charlottesville, Virginia
6. Department of Medicine, University of Toronto, Toronto, Ontario, Canada
7. Center for Travel and Tropical Medicine, Toronto General Hospital, Toronto, Ontario, Canada
8. Department of Medicine, Division of Geographic Medicine, University of Alabama at Birmingham, Birmingham
9. Department of Epidemiology, Division of Geographic Medicine, University of Alabama at Birmingham, Birmingham
10. Department of Medicine, Infectious Diseases, Emory University School of Medicine, Atlanta, Georgia
11. Division of Global Migration and Quarantine, Centers for Disease Control and Prevention, Atlanta, Georgia
12. Department of Internal Medicine, St. Luke's Hospital, Houston, Texas
13. Center for Infectious Diseases, University of Texas at Houston School of Public Health, Houston, Texas
14. Department of Medicine, Baylor College of Medicine, Houston, Texas
15. Department of Medicine, New Haven, Connecticut
16. Department of Laboratory Medicine, Yale Medical School, New Haven, Connecticut
17. Department of Pediatrics, Division of General Pediatric and Adolescent Medicine, Mayo Clinic College of Medicine, Rochester, Minnesota
18. Mayo Eugenio Litta Children's Hospital, Mayo Clinic, Rochester, Minnesota
19. Department of Medicine, Division of Infectious Diseases, Harvard Medical School, Boston, Massachusetts
20. Harvard School of Public Health, Boston, Massachusetts
21. Tropical and Geographic Medicine Center, Massachusetts General Hospital, Boston, Massachusetts