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Comparison of microPADs before and after miniaturization. (a) Wax-printed MicroPADs which show the miniaturization process. (b) Photograph of a miniaturized microPAD with roughly a 78% reduction in the surface area.101 Reproduced with permission from Strong et al., Sci. Rep. 9(1), 1–9 (2019). Copyright 2019 Author(s), licensed under a Creative Commons Attribution 4.0 International (CC BY 4.0) License.
