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Disappointed researcher looking microscope in medical laboratory close up. Dissatisfied man scientist holding test tube feeling failure. Sad specialist in safety eyeglasses failed vaccine research.
Keywords:
men
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adult
laboratory
working
professional occupation
indoors
caucasian ethnicity
scientific experiment
analyzing
biotechnology
science
microscope
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lab coat
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scientist
technology
occupation
chemistry
chemist
one person
man
one
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