1 Oxford Eye Hospital, Oxford University, Oxford, United Kingdom of Great Britain and Northern Ireland.
2 Nuffield Laboratory of Ophthalmology, University of Oxford Nuffield Department of Clinical Neurosciences, Oxford, United Kingdom of Great Britain and Northern Ireland.
3 Department of Ophthalmology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.
4 Department of Ophthalmology, University Hospital Heidelberg, Heidelberg, Germany.
5 Department of Ophthalmology, University Medical Center Göttingen, Göttingen, Germany.
6 Department of Ophthalmology, University Hospital, Heinrich-Heine-University Düsseldorf, Düsseldorf, Germany.
7 Oxford Eye Hospital, University of Oxford, Oxford, United Kingdom of Great Britain and Northern Ireland.