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microscopic image of blood cells flowing in a vein

Stock Photo:
Image ID: 1114717
500x375 6.9"x5.2" (72dpi) 117 KB
1000x750 3.3"x2.5" (300dpi) 336 KB
4850x3638 16.2"x12.1" (300dpi) 1.1 MB
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