Epidemiologic studies in a large company based on health and personnel records.
D003644:Death Certificates; D003710:Demography; D004781:Environmental Exposure; D005500:Follow-Up Studies; D006184:Habits; D006801:Humans; D008499:Medical Records; D009026:Mortality; D009786:Occupational Health Services; D011159:Population Surveillance; D012494:Sampling Studies