1. Medical Research Council Centre for Neuropsychiatric Genetics and Genomics, Institute of Psychological Medicine and Clinical Neurosciences, School of Medicine, Cardiff University, Cardiff, Wales
2. Department of Psychological Medicine, University of Worcester, Worcester, England
3. Medical Genetics Section, Centre for Genomic and Experimental Medicine, Institute of Genetics and Molecular Medicine, University of Edinburgh, Edinburgh, Scotland
4. Division of Psychiatry, University of Edinburgh, Edinburgh, Scotland