11.   The concentration of other essential cationic metals in gastric juice did not differ between healthy subjects and those with peptic ulcer disease.

12.   Although duodenal ulcers rarely form in patients with achlorhydria, the widely held belief that all patients with duodenal ulcer disease secrete excessive amounts of acid is incorrect.

13.   This infection is thought to play an important part in the pathogenesis of the ulcer disease as eradicating it dramatically lowers the ulcer relapse rate.

14.   Five were smokers but only one drank more than five units of alcohol a week and only one patient had a family history of ulcer disease.

15.   Detailed studies of gastric function were not performed in the H pylori negative patients with DU in whom an explanation for their ulcer disease was apparent.

16.   In half of the H pylori negative patients with DU, as explanation for the ulcer disease was readily apparent.