title: The problem of duodenal ulcer in the Royal Navy.
mesh_terms: D000328:Adult; D004381:Duodenal Ulcer / Q000453:epidemiology*; D006801:Humans; D008297:Male; D008889:Military Personnel; D009326:Naval Medicine; D010555:Personality Inventory; D013315:Stress, Psychological; D006113:United Kingdom