1. School of Medicine, Centre for Trials Research, College of Biomedical & Life Sciences Cardiff University Cardiff Wales UK
2. PRIME Centre Wales and Division of Population Medicine Cardiff University Cardiff Wales UK
3. Department of Primary Care and Public Health Imperial College London London UK
4. Radboud University Medical Center Nijmegen The Netherlands
5. Centre for Health Economics and Medicines Evaluation, Bangor University Bangor Wales UK
6. Policy, Research and International Development, Public Health Wales Cardiff Wales UK
7. Public Health Wales NHS Trust Cardiff Wales UK