1. Moorfields Eye Hospital NHS Foundation Trust, Londres, Reino Unido.
2. Academic Unit of Ophthalmology, Institute of Inflammation and Ageing, University of Birmingham, Birmingham, Reino Unido.
3. University Hospitals Birmingham NHS Foundation Trust, Birmingham, Reino Unido.
4. Health Data Research Reino Unido, Londres, Reino Unido.
5. Birmingham Health Partners Centre for Regulatory Science and Innovation, University of Birmingham, Birmingham, Reino Unido.
6. Centre for Patient Reported Outcomes Research, Institute of Applied Health Research, University of Birmingham, Birmingham.
7. Institute of Applied Health Research, University of Birmingham, Birmingham, Reino Unido.
8. Centre for Journalology, Clinical Epidemiology Program, Ottawa Hospital Research Institute, Ottawa, Canadá.
9. School of Epidemiology and Public Health, Faculty of Medicine, University of Ottawa, Ottawa, Canada.
10. National Institute of Health Research Birmingham Biomedical Research Centre, University of Birmingham and University Hospitals Birmingham NHS Foundation Trust, Birmingham, Reino Unido.; National Institute of Health Research Applied Research Collaborative West Midlands, Coventry, Reino Unido.; National Institute of Health Research Surgical Reconstruction and Microbiology Centre, University of Birmingham and University Hospitals Birmingham NHS Foundation Trust, Birmingham, Reino Unido.
11. Centre for Patient Reported Outcomes Research, Institute of Applied Health Research, University of Birmingham, Birmingham.; NIHR Biomedical Research Center at Moorfields Eye Hospital NHS Foundation Trust and UCL Institute of Ophthalmology, Londres, Reino Unido. a.denniston@bham.ac.uk
12. La lista de autores y sus afiliaciones aparecen al final del artículo.