TY - JOUR T1 - LESLIE BUCHANAN JF - British Journal of Ophthalmology JO - Br J Ophthalmol SP - 429 LP - 430 DO - 10.1136/bjo.27.9.429 VL - 27 IS - 9 A2 - , Y1 - 1943/09/01 UR - http://bjo.bmj.com/content/27/9/429.abstract N2 - 300 Multiple ChoicesThis is a pdf-only article and there is no markup to show you.full-text.pdf ER -