1. School of Dental Sciences, Newcastle University, Newcastle upon Tyne, UK
2. Population Health Sciences Institute, Newcastle University, Newcastle upon Tyne, UK
3. Nursing, Midwifery & Health, Northumbria University, Newcastle-upon-Tyne, UK
4. ScHARR, University of Sheffield, Regent Court, Sheffield, UK
5. Yunus Centre for Social Business and Health, Glasgow Caledonian University, Glasgow, UK