1. Senior research associate at the MRC Integrative Epidemiology Unit, Bristol Medical School, University of Bristol.
2. ESRC postdoctoral fellow at the MRC Integrative Epidemiology Unit, Bristol Medical School, University of Bristol.
3. Senior research fellow at the MRC Integrative Epidemiology Unit, Bristol Medical School, University of Bristol.
4. Senior lecturer in epidemiology at the MRC Integrative Epidemiology Unit, Bristol Medical School, University of Bristol.