1. Departments of Pediatrics,
2. Epidemiology, University of Pittsburgh, Pittsburgh, Pennsylvania;
3. Pediatrics, University of Tennessee, Memphis, Tennessee;
4. Pediatrics, University of California–Davis, Sacramento, California;
5. Pediatrics, University of Texas–Southwestern, Dallas, Texas; and
6. Medical Physics, and
7. Psychiatry, University of Wisconsin, Madison, Wisconsin;
8. Pediatrics, Children’s National Medical Center, Washington, DC