[Observations on the incidence of chronic bronchial diseases among railway personnel and relative repercussions on work fitness].
D001982:Bronchial Diseases; D002908:Chronic Disease; D006801:Humans; D015994:Incidence; D009787:Occupational Medicine; D009790:Occupations; D011890:Railroads
BRONCHIAL DISEASES; INDUSTRIAL MEDICINE; RAILROADS