%0 Journal Article %A Tamhane Ashutosh %A Gerald McGwin %T Case–control or cohort study? %D 2011 %R 10.1136/bjo.2011.203141 %J British Journal of Ophthalmology %P 1175-1175 %V 95 %N 8 %U https://bjo.bmj.com/content/bjophthalmol/95/8/1175.1.full.pdf