[The incidence of gastroduodenal ulcer in naval petty officers and chief boatswains].
D001699:Biometry; D004194:Disease; D006801:Humans; D015994:Incidence; D008889:Military Personnel; D010437:Peptic Ulcer / Q000706:statistics & numerical data*
ARMED FORCES PERSONNEL/diseases; PEPTIC ULCER/statistics
Frekvensen av ulcus gastroduodenale hos flottans underofficerare och högbåtsmän.