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Free doxorubicin is used in several treatment protocols for non-Hodgkin 's lymphoma . After completion of this educational activity , the reader should be able to : explain why asbestos may be a health hazard , describe the factors contributing to asbestos toxicity , identify potential environmental and occupational sources of exposure to asbestos , identify evaluation and treatment protocols for persons exposed to asbestos , and list sources of information on asbestos .