1. Center for Child Health, Behavior and Development, Seattle Children's Research Institute, Seattle, Washington.
2. Division of Adolescent Medicine, Seattle Children's Hospital, Seattle, Washington.
3. Division of Endocrinology, Seattle Children's Hospital, Seattle, Washington.
4. Department of Pediatrics and Adolescent Medicine, School of Medicine, University of Washington, Seattle, Washington.
5. The Warren Alpert Medical School, Brown University, Providence, Rhode Island.