1. Department of Clinical Engineering, Liverpool University Hospitals NHS Foundation Trust, Liverpool L7 8YE, UK
2. NHS Digital, Liverpool University Hospitals NHS Foundation Trust, Liverpool L7 8YE, UK
3. Liverpool Ocular Oncology Research Group, Department of Molecular and Cancer Medicine, University of Liverpool, Liverpool L7 8TX, UK
4. Liverpool Ocular Oncology Centre, Liverpool University Hospitals NHS Foundation Trust, Liverpool L7 8TX, UK
5. Department of Clinical Engineering, University Hospitals Bristol and Weston NHS Foundation Trust, Bristol BS2 8HW, UK
6. Consultant Ocular Oncologist, St Erik’s Eye Hospital & Karolinska Institutet, 171 64 Stockholm, Sweden
7. Manchester Centre for Health Economics, Division of Population Health, Health Services Research and Primary Care, The University of Manchester, Manchester M13 9PL, UK