%0 Journal Article %A B C Morson %T Premalignant conditions of the gastrointestinal tract %D 1991 %R 10.1136/gut.32.5.552-a %J Gut %P 552-552 %V 32 %N 5 %U https://gut.bmj.com/content/gutjnl/32/5/552.2.full.pdf