1. MRC Integrative Epidemiology Unit at the University of Bristol, Bristol, United Kingdom
2. UK Centre for Tobacco and Alcohol Studies, School of Experimental Psychology, University of Bristol, Bristol, United Kingdom
3. Department of Population Health Sciences, Bristol Medical School, University of Bristol, Bristol, United Kingdom
4. National Institute for Health Research Bristol Biomedical Research Centre at the University Hospitals Bristol NHS Foundation Trust and the University of Bristol, Bristol, United Kingdom
5. Institute of Psychological Medicine and Clinical Neurosciences, MRC Centre for Neuropsychiatric Genetics and Genomics, Cardiff University, Cardiff, United Kingdom