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    Crop anonymous doctor in medical glove demonstrating test tube with blood sample on white background — Stock Photo
    Crop anonymous doctor in medical glove demonstrating test tube with blood sample on white background
    Rack of test tubes with blood samples in laboratory. — Stock Photo
    Rack of test tubes with blood samples in laboratory.
    Single test tube with blood sample. — Stock Photo
    Single test tube with blood sample.
    Vintage glass syringe and medecal needle — Stock Photo
    Vintage glass syringe and medecal needle
    Close-up of blood sample in kidney dish. — Stock Photo
    Close-up of blood sample in kidney dish.
    Scientist selecting human blood sample in laboratory. — Stock Photo
    Scientist selecting human blood sample in laboratory.
    Female scientist holding blood sample by microscope in laboratory. — Stock Photo
    Female scientist holding blood sample by microscope in laboratory.
    Laboratory technician holding test tubes in blood bank — Stock Photo
    Laboratory technician holding test tubes in blood bank
    Blood sample in tube on blue background. — Stock Photo
    Blood sample in tube on blue background.
    Close-up of test tube in rack at blood bank — Stock Photo
    Close-up of test tube in rack at blood bank