Health hazards in the workplace--an approach to surveillance.
D004781:Environmental Exposure; D006804:Ergonomics; D006801:Humans; D017053:Infection Control; D008297:Male; D008875:Middle Aged; D009623:Noise, Occupational / Q000517:prevention & control; D009784:Occupational Diseases / Q000517:prevention & control*; D009786:Occupational Health Services