1 Moorfields Eye Hospital NHS Foundation Trust, London, United Kingdom. Electronic address: stefaniele@free.fr.
2 Moorfields Eye Hospital NHS Foundation Trust, London, United Kingdom.
3 Royal Liverpool University Hospital, Liverpool, United Kingdom.
4 Moorfields Eye Hospital NHS Foundation Trust, London, United Kingdom; NIHR Biomedical Research Centre for Ophthalmology at Moorfields Eye Hospital and UCL Institute of Ophthalmology, London, UK.