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. 2011 Sep 20;105(8):1218–1223. doi: 10.1038/bjc.2011.353

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Copyright © 2011 Cancer Research UK

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Example of a nucleus stained with Feulgen and captured by digital imaging. The schematic on the left demonstrates a window comprising nine pixels in a 3 × 3 square. The numbers correspond to the grey level of each individual pixel.