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    Urine sample and diagnostic dipstick on surgical tray. — Stock Photo
    Urine sample and diagnostic dipstick on surgical tray.
    Pool of blood in watch glass with syringe. — Stock Photo
    Pool of blood in watch glass with syringe.
    Close-up of hands of scientist placing slide with human sample under light microscope for medical testing. — Stock Photo
    Close-up of hands of scientist placing slide with human sample under light microscope for medical testing.
    Pool of blood in watch glass with syringe. — Stock Photo
    Pool of blood in watch glass with syringe.
    Variety of potential drugs in pharmaceutical vials and test tubes. — Stock Photo
    Variety of potential drugs in pharmaceutical vials and test tubes.
    Drug research and clinical testing — Stock Photo
    Drug research and clinical testing