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(A) Microgrooves containing collagen enable the formation of tubes with lumen. Adapted with permission [194]. 2010, Elsevier. (B) gelatin microribbons can be used to supplement structure to hydrogel matrices (left to right: 2.5%, 5%, 10% gelatin). Immunofluroescence images of cells adherent to the ribbons at after 6 d. Reproduced with permission.[197] 2013, Wiley-VCH.
