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10. Ng WL, Lee JM, Yeong WY, et al., 2017, Microvalve-based
6. Acknowledgement bioprinting – process, bio-inks and applications. Biomater
This work is part of the project ArtiVasc 3D (http://www. Sci, 5(4): 632. https://doi.org/10.1039/c6bm00861e
artivasc.eu/). It is financially supported by the European 11. Melchels FPW, Domingos MAN, Klein TJ, et al., 2012,
Union’s Seventh Framework Programme (FP/2007-2013) Additive manufacturing of tissues and organs. Prog
under grant agreement No. 263416 (ArtiVasc 3D). The Polym Sci, 37(8): 1079–1104. http://dx.doi.org/10.1016/
authors thank Dr Kirsten Borchers (Fraunhofer IGB,
Germany) for providing methacryl-modified gelatin, j.progpolymsci.2011.11.007
and Dr Birgit Huber (formerly University of Stuttgart, 12. Miller JS, Stevens KR, Yang MT, et al., 2012, Rapid casting
Germany), Dr Petra Kluger (formerly Fraunhofer IGB, of patterned vascular networks for perfusable engineered
Germany) and Ivan Calderon (Unitechnologies SA, three-dimensional tissues. Nat Mater, 11(9): 768–774.
Switzerland) for design and production of the perfusion https://doi.org/10.1038/nmat3357
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13. Kolesky D, Truby R, Gladman S, et al., 2014, 3D
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