%0 Journal Article %A K D Frick %A S M Kymes %T The calculation and use of economic burden data %D 2006 %R 10.1136/bjo.2005.084848 %J British Journal of Ophthalmology %P 255-257 %V 90 %N 3 %U https://bjo.bmj.com/content/bjophthalmol/90/3/255.full.pdf