1. Division of Birth Defects and Infant Disorders, National Center on Birth Defects and Developmental Disabilities, Centers for Disease Control and Prevention, Atlanta, Georgia
2. Division of Healthcare Quality Promotion, National Center for Emerging and Zoonotic Infectious Diseases, Centers for Disease Control and Prevention, Atlanta, Georgia
3. United States Public Health Service, Atlanta, Georgia
4. Department of Psychiatry and Psychology, Mayo Clinic, Jacksonville, Florida
5. Slone Epidemiology Center at Boston University, Boston, Massachusetts