Extracellular Matrix-like Cell-Adhesive Hydrogels from RGD-Containing Poly(ethylene glycol) Diacrylate ZhuJunmin BeamishJeffrey A. TangChad Kottke-MarchantKandice MarchantRoger E. 2006 Extracellular Matrix-like Cell-Adhesive Hydrogels from RGD-Containing Poly(ethylene glycol) Diacrylate