- Correspondence to Professor Alexander JE Foss, Department of Ophthalmology, Queen's Medical Centre, Nottingham NG7 2UH, UK;
- Received 7 September 2015
- Revised 5 December 2015
- Accepted 25 January 2016
- Published in print 1 November 2016.
- Published online 21 October 2016.
- Published first 7 March 2016.
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