3D bioprinting of bioinks containing 3T3 fibroblasts. The protocol for formulating the bioinks for 3D bioprinting was similar to that used for preparing the bioinks for 3T3 fibroblast-laden cast constructs. After adding the cells, the bioink was heated at 37 ºC, placed in a syringe and centrifuged at 500g. Mesh constructs were bioprinted using the conditions described in Table , and the 3D printed constructs were incubated at 37 ºC and 5% CO2, with culture media changes every 3 days. Two experiments were performed with a final composition of the bioinks of 5%GelMA-0.5%CBP-0.5%LAP and cell concentrations of 0.5×10 6 cells/mL or 5×10 6 cells/mL.