Creation of micro-tissues using cylindrical collagen gels, called modules, that contain embedded cells and which surface is coated with endothelial cells.
Chamberlain, M. D., Butler, M. J., Ciucurel, E. C., Fitzpatrick, L. E., Khan, O. F., Leung, B. M., Lo, C., Patel, R., Velchinskaya, A., Voice, D. N., Sefton, M. V. Fabrication of Micro-tissues using Modules of Collagen Gel Containing Cells. J. Vis. Exp. (46), e2177, doi:10.3791/2177 (2010).