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. 2021 Jul 13;12:20417314211028574. doi: 10.1177/20417314211028574

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© The Author(s) 2021

This article is distributed under the terms of the Creative Commons Attribution-NonCommercial 4.0 License (https://creativecommons.org/licenses/by-nc/4.0/) which permits non-commercial use, reproduction and distribution of the work without further permission provided the original work is attributed as specified on the SAGE and Open Access pages (https://us.sagepub.com/en-us/nam/open-access-at-sage).

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Figure 3. — (a) Device diagram of extrusion-based bioprinting. Dotted line frame A is an extrusion device, dotted line frame B is a printing platform, and dotted line frame C is a cleaning and correction device, wherein the cleaning device is located at the front, which mainly cleans syringes, and the rear is a correction device, (b) hydrogel scaffold printed with 1% ADM and 5% GelMA, (c) hydrogel scaffold printed with 5% GelMA, (d) hydrogel scaffold printed with 2% ADM, (e) hydrogel scaffold printed with 100 ppm AgNPs and 15% GelMA, (f) printed 100 ppm AgNPs and 15% GelMA scaffolds, and (g) HE staining of 3D bioprinted skin after 14 days of gas-liquid culture (b–d: bar:2 mm, E: bar:5 mm, G: bar:50 μm).