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    Female laboratory assistant using pipette. — Stock Photo
    Female laboratory assistant using pipette.
    Close up of male student practicing experiment in lab — Stock Photo
    Close up of male student practicing experiment in lab
    Close-up of female scientists using pipette in laboratory — Stock Photo
    Close-up of female scientists using pipette in laboratory
    Male laboratory assistant using pipette. — Stock Photo
    Male laboratory assistant using pipette.
    Attentive male scientist experimenting in laboratory — Stock Photo
    Attentive male scientist experimenting in laboratory
    Male student practicing experiment in lab — Stock Photo
    Male student practicing experiment in lab
    Scientist pipetting sample into vial in laboratory. — Stock Photo
    Scientist pipetting sample into vial in laboratory.