1. Department of Pediatrics, Mattel Children’s Hospital, David Geffen School of Medicine, University of California at Los Angeles, Los Angeles, California;
2. UCLA/RAND Prevention Research Center, Los Angeles, California;
3. RAND, Santa Monica, California;
4. Meharry Medical College, Nashville, Tennessee;
5. Division of General Pediatrics, Children’s Hospital Boston, Boston, Massachusetts;
6. Department of Pediatrics, Harvard Medical School, Cambridge, Massachusetts; and
7. Department of Health Services, UCLA School of Public Health, Los Angeles, California