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Results 1 - 3 of 3 for Tar
  1. Heroin (National Library of Medicine)  
    ... or a black sticky substance known as black tar heroin. How do people use heroin? People inject, ...
  2. Lung Cancer (National Library of Medicine)  
    ... to asbestos, arsenic, chromium, beryllium, nickel, soot, or tar in the workplace Being exposed to radiation, such ...
  3. Smoking and Youth (National Library of Medicine)  
    ... cigars are not safe alternatives to cigarettes. Low-tar and additive-free tobacco products are not safe ...