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    Scientist preparing samples in microcentrifuge tubes for chemical analysis. — Stock Photo
    Scientist preparing samples in microcentrifuge tubes for chemical analysis.
    Close-up of pipette pipetting into test tubes in pathogenic laboratory. — Stock Photo
    Close-up of pipette pipetting into test tubes in pathogenic laboratory.
    Laboratory technician analyzing blood samples in blood bank — Stock Photo
    Laboratory technician analyzing blood samples in blood bank
    Multipipette and rack of vials for genetic research on white background. — Stock Photo
    Multipipette and rack of vials for genetic research on white background.
    Close-up of rack of cell cultures in tubes in laboratory. — Stock Photo
    Close-up of rack of cell cultures in tubes in laboratory.
    Attentive female scientist experimenting in laboratory — Stock Photo
    Attentive female scientist experimenting in laboratory
    Microcentrifuge sample tubes in styrofoam rack on blue background. — Stock Photo
    Microcentrifuge sample tubes in styrofoam rack on blue background.
    Close-up of pipetting blood sample into microcentrifuge tubes. — Stock Photo
    Close-up of pipetting blood sample into microcentrifuge tubes.
    Close-up of beaker, test tube rack and clipboard on table — Stock Photo
    Close-up of beaker, test tube rack and clipboard on table
    Blood sampling vacutainer tubes in rack, close-up. — Stock Photo
    Blood sampling vacutainer tubes in rack, close-up.
    Laboratory technician analyzing chemical solution in blood bank — Stock Photo
    Laboratory technician analyzing chemical solution in blood bank
    Female scientist examining test tube in laboratory — Stock Photo
    Female scientist examining test tube in laboratory
    Attentive male scientist experimenting in laboratory — Stock Photo
    Attentive male scientist experimenting in laboratory
    Close-up of beaker, test tube rack and clipboard on table — Stock Photo
    Close-up of beaker, test tube rack and clipboard on table
    Laboratory technician analyzing blood bag in blood bank — Stock Photo
    Laboratory technician analyzing blood bag in blood bank
    Pipette dripping liquid into test tubes. — Stock Photo
    Pipette dripping liquid into test tubes.
    Smiling male science teacher helping girl students conducting scientific experiment at microscope in laboratory — Stock Photo
    Smiling male science teacher helping girl students conducting scientific experiment at microscope in laboratory
    Group of laboratory test tubes. — Stock Photo
    Group of laboratory test tubes.
    Rack of food samples in test tubes. — Stock Photo
    Rack of food samples in test tubes.
    Laboratory technician checking invoices in blood bank — Stock Photo
    Laboratory technician checking invoices in blood bank
    Single test tube with blood sample in rack. — Stock Photo
    Single test tube with blood sample in rack.
    Single test tube with blood sample in rack. — Stock Photo
    Single test tube with blood sample in rack.
    Close-up of pipetting sample into plastic micro-centrifuge tube rack. — Stock Photo
    Close-up of pipetting sample into plastic micro-centrifuge tube rack.
    Close-up of pipetting blood sample into microcentrifuge tubes. — Stock Photo
    Close-up of pipetting blood sample into microcentrifuge tubes.
    Sample tube with blue liquid in pink rack. — Stock Photo
    Sample tube with blue liquid in pink rack.
    Close-up of rack of sample tubes with blood for analysis. — Stock Photo
    Close-up of rack of sample tubes with blood for analysis.
    Specimens in rack on laboratory counter — Stock Photo
    Specimens in rack on laboratory counter