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    Close-up of micropipette pipetting blood sample into microcentrifuge tubes. — Stock Photo
    Close-up of micropipette pipetting blood sample into microcentrifuge tubes.
    Close-up of centrifuge with sample in tube in hands of scientists. — Stock Photo
    Close-up of centrifuge with sample in tube in hands of scientists.
    Close-up of pipette pipetting into microcentrifuge tubes in pathogenic laboratory. — Stock Photo
    Close-up of pipette pipetting into microcentrifuge tubes in pathogenic laboratory.
    Close-up of microcentrifuge tubes with various samples. — Stock Photo
    Close-up of microcentrifuge tubes with various samples.
    Blood samples in microcentrifuge tube strip for genetic analysis. — Stock Photo
    Blood samples in microcentrifuge tube strip for genetic analysis.
    Three microcentrifuge tubes with pink liquid in tube rack. — Stock Photo
    Three microcentrifuge tubes with pink liquid in tube rack.
    Cropped view of scientist pipetting samples into microcentrifuge tubes. — Stock Photo
    Cropped view of scientist pipetting samples into microcentrifuge tubes.
    Scientist preparing samples in microcentrifuge tubes for chemical analysis. — Stock Photo
    Scientist preparing samples in microcentrifuge tubes for chemical analysis.