Changing concepts in occupational health.
D000062:Accidents, Occupational / Q000517:prevention & control; D003327:Coronary Disease / Q000517:prevention & control; D004781:Environmental Exposure; D006801:Humans; D006920:Hygiene; D009784:Occupational Diseases / Q000517:prevention & control; D009787:Occupational Medicine; D010437:Peptic Ulcer / Q000517:prevention & control; D010808:Physical Examination; D014648:Varicose Veins / Q000517:prevention & control