1. Patient and Population Health and Informatics Research, Swansea University Medical School, Swansea, United Kingdom;
2. Cochrane Institute of Primary Care and Public Health, Cardiff University, Cardiff, United Kingdom;
3. Abertawe Bromorgannwg University Health Board, Swansea, United Kingdom;
4. Farr Institute, Swansea University Medical School, Swansea University, United Kingdom; and
5. Public Health Wales NHS Trust, Carmarthen, United Kingdom