11.   It certainly sounds as if he might have a peptic ulcer - especially as the pain is eased by milk.

12.   Peptic ulcer is a convenient term which covers both gastric and duodenal ulcers.

13.   Peptic ulcers are produced by the self-destruction of the gut wall by pepsin and hydrochloric acid in gastric juice.

14.   Nevertheless, the data suggest that if levels were more accurate they would have been lower in the peptic ulcer group.