1. Department of Pediatrics, University of Louisville School of Medicine, Louisville, Kentucky
2. Tufts Clinical and Translational Science Institute, Boston, Massachusetts
3. Institute for Clinical Research and Health Policy Studies, Tufts Medical Center, Boston, Massachusetts
4. University of Kentucky School of Medicine, Lexington
5. The College on Problems of Drug Dependence, Philadelphia, Pennsylvania
6. University of Maryland, College Park
7. University of North Carolina, Chapel Hill
8. Women and Infants Hospital, Providence, Rhode Island
9. The Floating Hospital for Children at Tufts Medical Center, Boston, Massachusetts