91.   Phosphatidylglycerol was detectable in patients with chronic atrophic gastritis, but not in controls or in patients with duodenal ulcer.

92.   There was no difference in the phospholipid composition between antral and duodenal sites in patients with duodenal ulcer.

93.   Despite differences in method and in the number of the patients studied, their values for phospholipid composition in patients with duodenal ulcer are very similar to ours.

94.   It has been reported that there is an association between duodenal ulcer and PGA phenotype A.

95.   Serum PGA values were significantly higher in patients with duodenal ulcer than in controls and in patients with gastric ulcer.

96.   Serum PGC values were significantly higher in patients with gastric ulcer and in patients with duodenal ulcer than in controls.

97.   It has been reported that blood group O and non-secretor status are associated with duodenal ulcer, however, the magnitude of the association was very weak.

98.   If the PGA genes are on the average linked to one of responsible genes for duodenal ulcer, the association is expected to vary among populations.

99.   The incidence of gastric ulcer is higher than that of duodenal ulcer in Japan.

100.   In contrast, duodenal ulcer is more common than gastric ulcer in most western countries.