| http://www.w3.org/ns/prov#value | - The presence of a hydrogel and/or structural proteins in the pores in preferred embodiments can improve the retention of bioactive agents and can increase the amount of bioactive agents that can be effectively associated with the porous material. [0070] For example, pores of a prosthesis can be associated with one or more cytokines, growth factors, such as vascular endothelial growth factor (VEGF)
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