1. Division of Infectious Diseases, Department of Medicine, University of British Columbia, Vancouver, Canada
2. Otolaryngology, The Head and Neck Institute, Cleveland Clinic, Ohio
3. Department of Pediatrics, Georgetown University School of Medicine, Washington, D.C.
4. Department of Clinical Epidemiology and Biostatistics
5. Department of Medicine, McMaster University, Hamilton, Ontario, Canada
6. Department of Medicine, David Geffen School of Medicine at the University of California, Los Angeles
7. R. M. Alden Research Laboratory, Santa Monica, California
8. National Center for Immunization and Respiratory Diseases, Centers for Disease Control and Prevention, Atlanta, Georgia
9. Department of Infectious Disease Research, Ochsner Clinic Foundation, New Orleans, Louisiana
10. Division of General Internal Medicine, University of South Florida College of Medicine, Tampa
11. Department of Emergency Medicine, University of Massachusetts, Worcester
12. Department of Pediatrics, University of Wisconsin School of Medicine and Public Health, Madison
13. Department of Infectious Diseases, Northeast Ohio Medical University, Rootstown
14. Summa Health System, Akron, Ohio