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A medical or scientific researcher or doctor looking at a test tube , isolated on white background

Stock Photo:
Image ID: 115993555
Release Information: Signed model release filed with Shutterstock, Inc
373x500 5.2"x6.9" (72dpi) 121 KB
746x1000 2.5"x3.3" (300dpi) 410 KB
3744x5016 12.5"x16.7" (300dpi) 5.1 MB
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