1. Division of Healthcare Quality Promotion, Centers for Disease Control and Prevention, Atlanta, Georgia
2. Department of Infectious Diseases, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania
3. Acute Communicable Diseases and Emerging Infections, Philadelphia Department of Public Health, Philadelphia, Pennsylvania
4. Department of Pediatrics and Communicable Diseases, University of Michigan Health System, Ann Arbor, Michigan
5. Division of Pediatric Infectious Diseases, St Louis Children's Hospital/Washington University School of Medicine, St Louis, Missouri
6. Methodist Children's Hospital of South Texas, San Antonio, Texas