TY - JOUR T1 - Corrigendum JF - British Journal of Ophthalmology JO - Br J Ophthalmol SP - 380 LP - 380 DO - 10.1136/bjo.30.6.380 VL - 30 IS - 6 A2 - , Y1 - 1946/06/01 UR - http://bjo.bmj.com/content/30/6/380.abstract N2 - 300 Multiple ChoicesThis is a pdf-only article and there is no markup to show you.full-text.pdf ER -