1. Institute of Health and Society; Newcastle University; Newcastle upon Tyne United Kingdom
2. Department of Primary Care and Population Health; Institute of Epidemiology and Health Care; University College of London; London United Kingdom
3. Institute of Education; University College of London; London United Kingdom
4. Department of Epidemiology and Public Health; Institute of Epidemiology and Health Care; University College of London; London United Kingdom
5. Centre for Oral Health Research and School of Dental Sciences; Newcastle University; Newcastle upon Tyne United Kingdom
6. Institute of Neuroscience; Newcastle University; Newcastle upon Tyne United Kingdom
7. Biomedical Research Centre; National Institute for Health Research; Newcastle University and Newcastle upon Tyne Hospitals NHS Foundation Trust; Newcastle upon Tyne United Kingdom
8. Population Health Research Institute; St George's University of London; London United Kingdom