TY - JOUR T1 - Abstracts JF - British Journal of Ophthalmology JO - Br J Ophthalmol SP - 560 LP - 565 DO - 10.1136/bjo.26.12.560 VL - 26 IS - 12 A2 - , Y1 - 1942/12/01 UR - http://bjo.bmj.com/content/26/12/560.abstract N2 - 300 Multiple ChoicesThis is a pdf-only article and there is no markup to show you.full-text.pdf ER -