Achtsidis Vasileios, Gregory Maria Elena, Roberts Fiona, Kemp Ewan G
Eye Department, Tennent Institute of Ophthalmology, 1053 Great Western Road, Glasgow G12 0YN, UK.
Br J Ophthalmol. 2012 Sep;96(9):1268-9, 1277. doi: 10.1136/bjophthalmol-2012-301996. Epub 2012 Aug 7.