1. The Institute for Clinical Research and Health Policy Studies, Tufts Medical Center, Boston, Massachusetts.
2. Tufts University School of Medicine, Boston, Massachusetts.
3. Floating Hospital for Children, Tufts Medical Center, Boston, Massachusetts.
4. The Zucker Hillside Hospital, North Shore-LIJ Health System, Glen Oaks, New York.
5. Center for Clinical and Community Research, Children's National Medical Center, Washington, DC.
6. Department of Psychiatry and Biobehavioral Sciences, University of California at Los Angeles, Los Angeles, California.