1. Department of Psychiatry, Faculty of Medicine, British Columbia Children's Hospital, University of British Columbia, Vancouver, Canada.
2. Department of Psychiatry, Harvard Medical School, Massachusetts General Hospital, Boston, Massachusetts.
3. Department of Psychiatry and Behavioral Sciences, Johns Hopkins University School of Medicine, Baltimore, Maryland.
4. Department of Psychiatry and Human Behavior, Brown Medical School, Butler Hospital, Providence, Rhode Island.
5. Department of Psychiatry, University of Southern California School of Medicine, Los Angeles, California.
6. Unit of Statistical Genomics, Division of Intramural Research, National Institute of Mental Health, Bethesda, Maryland.