Roberts H W, Sood M, Sood S, Kotecha A, Ramirez-Florez S
Eye Department, Guy's & St Thomas' NHS Foundation Trust, London, UK.
Royal London Hospital, Barts Health NHS Trust, London, UK.
Eye (Lond). 2016 Aug;30(8):1149-50. doi: 10.1038/eye.2016.80. Epub 2016 Apr 22.