1 Institute of Ophthalmology, University College London, NIHR Moorfields Biomedical Research Centre, London, United Kingdom.
2 Institute of Ophthalmology, University College London, NIHR Moorfields Biomedical Research Centre, Centre for Medical Image Computing, Department of Computer Science, London, United Kingdom.
3 NIHR Moorfields Biomedical Research Centre, London, United Kingdom.
4 Institute of Ophthalmology, University College London, NIHR Moorfields Biomedical Research Centre, Queen Square Institute of Neurology, London, United Kingdom.