University College London - Centre for Outcomes Research and Effectiveness (CORE), University College London - Centre for Outcomes Research and Effectiveness (CORE), University of California, Los Angeles (UCLA) - Departments of Psychiatry and Biobehavioral Sciences, University College London - Centre for Outcomes Research and Effectiveness (CORE), University College London - Centre for Outcomes Research and Effectiveness (CORE), University College London - Department of Social Science, University of Pennsylvania, University of York - Department of Health Sciences, Vanderbilt University - Department of Psychology, University of Southampton - Primary Care and Population Science, University of Exeter - School of Psychology, University of Bristol, University of Bristol, University of Exeter, University of Bristol, University of York - Department of Health Sciences, University of York - Department of Health Sciences, University of Bristol, University College London, University College London - Division of Psychiatry and University College London - Centre for Outcomes Research and Effectiveness (CORE)