Factors related to respiratory symptoms in Irish men.
D000328:Adult; D000367:Age Factors; D006801:Humans; D007494:Ireland; D008297:Male; D008875:Middle Aged; D012120:Respiration Disorders / Q000453:epidemiology*; D012424:Rural Population; D012907:Smoking / Q000150:complications; D012923:Social Class; D014505:Urban Population