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    Blood cells, light micrograph. — Stock Photo
    Blood cells, light micrograph.
    Technician hand holding blood sample ready for testing in laboratory. — Stock Photo
    Technician hand holding blood sample ready for testing in laboratory.
    Blood test kit and and analysis results — Stock Photo
    Blood test kit and and analysis results
    Scientist selecting human blood sample in laboratory. — Stock Photo
    Scientist selecting human blood sample in laboratory.
    Hand of technician holding hepatitis sample for testing in laboratory. — Stock Photo
    Hand of technician holding hepatitis sample for testing in laboratory.
    Technician hand holding blood sample ready for testing in laboratory. — Stock Photo
    Technician hand holding blood sample ready for testing in laboratory.
    Female cell biologist placing flask containing stem cells cultivated in red growth medium under microscope. — Stock Photo
    Female cell biologist placing flask containing stem cells cultivated in red growth medium under microscope.
    Blood in human urine in sample pots, studio shot. — Stock Photo
    Blood in human urine in sample pots, studio shot.
    Scientist viewing medical sample on glass slide under microscope in laboratory. — Stock Photo
    Scientist viewing medical sample on glass slide under microscope in laboratory.
    Scanning electron micrograph of bacteria cultured from sample of human faeces. — Stock Photo
    Scanning electron micrograph of bacteria cultured from sample of human faeces.
    Researcher extracting blood from a vial — Stock Photo
    Researcher extracting blood from a vial
    DNA test result on microcentrifuge tube with DNA sample in scientist hand. — Stock Photo
    DNA test result on microcentrifuge tube with DNA sample in scientist hand.
    Blood sample awaiting testing in laboratory, close-up with selective focus. — Stock Photo
    Blood sample awaiting testing in laboratory, close-up with selective focus.