| Medical Research Council (MRC) Integrative Epidemiology Unit, University of Bristol, Bristol, England. |
| MRC Integrative Epidemiology Unit, University of Bristol, Bristol BS8 2BN, UK; UK Centre for Tobacco and Alcohol Studies and School of Experimental Psychology, University of Bristol, Bristol BS8 1TU, UK. |
| MRC Integrative Epidemiology Unit, University of Bristol, Bristol, UK. |
| UK Centre for Tobacco and Alcohol Studies, School of Experimental Psychology, University of Bristol, Bristol, UK. |