A pain in the eye: what’s the category?

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    Hong, G., Fu, T.-M., Qian, M., Viveros, R. D., Yang, X., Zhou, T., Lee, J. M., Park, H.-G., Sanes, J. R. & Lieber, C. M. Science 360, 1447–1451 (2018).

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Correspondence to Jerald Silverman.

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