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Violation of the assumption that samples are randomly selected affects researchers' ability to:
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A complex network of cells, tissues, organs, and substances that helps protect the body from infections and diseases.
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Y-shaped proteins produced by the immune system that help neutralize pathogens like bacteria and viruses.
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Drugs used to reduce tension or anxiety.
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An illegal, highly addictive opiate drug derived from morphine, known for its euphoric effects.
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