Fuente: WIPO "tomato" A film for integrating with tissue and promoting at least one of endothelial cell adhesion, migration, proliferation, ingrowth, infiltration, angiogenesis, sprouting angiogenesis, neovascularization, and vascularization includes a plurality of fibers arranged in an overlapping configuration to form a porous, thin film with an average pore size of at least 0.01 μm2 and less than 60 μm2. The plurality of fibers has an average diameter of at least 10 nm and less than 1,000 nm. Each of the plurality of fibers have an aspect ratio of length to width of at least 10, and each of the plurality of fibers is a biocompatible material.