1. Division of Adolescent Medicine, Department of Medicine, Children’s Hospital Boston and Harvard Medical School, Boston, Massachusetts;
2. Channing Laboratory, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts;
3. Departments of Epidemiology, and
4. Brain and Behavioural Sciences Unit, Institute of Child Health, University College London, London, United Kingdom;
5. Neuropsychiatric Research Institute and Department of Clinical Neuroscience, University of North Dakota School of Medicine and Health Sciences, Fargo, North Dakota;
6. Biostatistics, Harvard School of Public Health, Boston, Massachusetts;
7. King’s College London, Institute of Psychiatry, London, United Kingdom; and
8. Department of Mathematics and Statistics, Smith College, Northampton, Massachusetts