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    Female scientist examining cultures in petri dish. — Stock Photo
    Female scientist examining cultures in petri dish.
    Female scientist examining cultures in petri dish. — Stock Photo
    Female scientist examining cultures in petri dish.
    Female scientist examining cultures in petri dish. — Stock Photo
    Female scientist examining cultures in petri dish.
    Female scientist using microscope. — Stock Photo
    Female scientist using microscope.
    Female scientist holding petri dish with hazardous biological cultures. — Stock Photo
    Female scientist holding petri dish with hazardous biological cultures.
    Female scientist examining cultures in petri dish. — Stock Photo
    Female scientist examining cultures in petri dish.
    Female scientist holding petri dish with hazardous biological cultures. — Stock Photo
    Female scientist holding petri dish with hazardous biological cultures.
    Close-up of laboratory technician writing on test tube. — Stock Photo
    Close-up of laboratory technician writing on test tube.
    Biologist working with microscope with colleague in background — Stock Photo
    Biologist working with microscope with colleague in background
    Male scientist examining cultures in petri dish. — Stock Photo
    Male scientist examining cultures in petri dish.
    Female biologist holding flask containing stem cells. — Stock Photo
    Female biologist holding flask containing stem cells.
    Female scientist holding tube with blood sample. — Stock Photo
    Female scientist holding tube with blood sample.
    Female scientist holding microscope slide with blood sample. — Stock Photo
    Female scientist holding microscope slide with blood sample.
    Female scientist using pipette for dropping liquid into eppendorf tubes. — Stock Photo
    Female scientist using pipette for dropping liquid into eppendorf tubes.
    Female scientist looking at DNA autoradiogram. — Stock Photo
    Female scientist looking at DNA autoradiogram.
    Close-up of microcentrifuge tubes with biologist in background. — Stock Photo
    Close-up of microcentrifuge tubes with biologist in background.
    Close-up of microcentrifuge tubes with biologist in background. — Stock Photo
    Close-up of microcentrifuge tubes with biologist in background.
    Biologist working with microscope with colleagues in background — Stock Photo
    Biologist working with microscope with colleagues in background
    Male biologist working with microscope with colleague in background — Stock Photo
    Male biologist working with microscope with colleague in background
    Female scientist holding petri dish with biological cultures. — Stock Photo
    Female scientist holding petri dish with biological cultures.
    Pipetting blood sample, close-up. — Stock Photo
    Pipetting blood sample, close-up.
    Male biologist working with microscope with colleague in background — Stock Photo
    Male biologist working with microscope with colleague in background
    Scientist holding petri dish and swab. — Stock Photo
    Scientist holding petri dish and swab.
    Scientist holding petri dish and syringe. — Stock Photo
    Scientist holding petri dish and syringe.
    Male scientist using microscope, close-up. — Stock Photo
    Male scientist using microscope, close-up.
    Close-up of hand in glove adjusting microscope slide. — Stock Photo
    Close-up of hand in glove adjusting microscope slide.
    Male scientist using computer. — Stock Photo
    Male scientist using computer.
    Female scientist holding blood samples in test tubes. — Stock Photo
    Female scientist holding blood samples in test tubes.
    Female scientist using computer. — Stock Photo
    Female scientist using computer.
    Female scientist in protective mask using microscope. — Stock Photo
    Female scientist in protective mask using microscope.
    Male scientist in surgical cap using microscope. — Stock Photo
    Male scientist in surgical cap using microscope.
    Male scientist using microscope, close-up. — Stock Photo
    Male scientist using microscope, close-up.
    Close-up of hand in glove adjusting microscope slide. — Stock Photo
    Close-up of hand in glove adjusting microscope slide.
    Close-up of hands in gloves holding microscope slide. — Stock Photo
    Close-up of hands in gloves holding microscope slide.
    Male scientist using microscope, close-up. — Stock Photo
    Male scientist using microscope, close-up.
    Male scientist in protective mask using microscope. — Stock Photo
    Male scientist in protective mask using microscope.
    Male scientist wearing surgical cap using microscope. — Stock Photo
    Male scientist wearing surgical cap using microscope.