TY - JOUR T1 - ABSTRACTS JF - British Journal of Ophthalmology JO - Br J Ophthalmol SP - 309 LP - 313 DO - 10.1136/bjo.24.6.309 VL - 24 IS - 6 A2 - , Y1 - 1940/06/01 UR - http://bjo.bmj.com/content/24/6/309.abstract N2 - 300 Multiple ChoicesThis is a pdf-only article and there is no markup to show you.full-text.pdf ER -