%0 Journal Article %A B K Gray %A H E Lockhartmummery %A B C Morson %T Crohn's disease of the anal region. %D 1965 %R 10.1136/gut.6.6.515 %J Gut %P 515-524 %V 6 %N 6 %U https://gut.bmj.com/content/gutjnl/6/6/515.full.pdf