%0 Journal Article %A J Penston %A K G Wormsley %T Reply %D 1987 %R 10.1136/gut.28.10.1319-a %J Gut %P 1319-1320 %V 28 %N 10 %U https://gut.bmj.com/content/gutjnl/28/10/1319.2.full.pdf