1. Moorfields Eye Hospital (City Road); Moorfields Eye Hospital NHS Foundation Trust; London UK
2. Department of Biostatistics; Faculty of Medicine, University of Thessaly; Larissa Greece
3. 1st Department of Ophthalmology; Medical School, Aristotle University of Thessaloniki; Thessaloniki Greece
4. Institute of Ageing and Chronic Disease; University of Liverpool; Liverpool UK
5. Sunderland Eye Infirmary; Sunderland UK
6. Biosciences Institute; Newcastle University; Newcastle Upon Tyne UK