Epidemiological strategies and environmental factors.
D000393:Air Pollutants / Q000506:poisoning; D003142:Communication; D004467:Economics; D004781:Environmental Exposure; D004787:Environmental Pollution / Q000517:prevention & control; D004813:Epidemiology; D006801:Humans; D009369:Neoplasms / Q000139:chemically induced; D009784:Occupational Diseases / Q000139:chemically induced; D012923:Social Class; D014873:Water Pollutants / Q000506:poisoning
D000393:Air Pollutants; D014873:Water Pollutants