Collagen Type I/pharmacokinetics; Fibroblast Growth Factor 2/pharmacokinetics; Hydrogel, Polyethylene Glycol Dimethacrylate/metabolism; Hydrogel, Polyethylene Glycol Dimethacrylate/toxicity; Methylmethacrylates/metabolism; Polyhydroxyethyl Methacrylate/metabolism; Adsorption; Apoptosis/drug effects; Cell Adhesion/drug effects; Cells, Cultured; Coated Materials, Biocompatible/chemical synthesis; Coated Materials, Biocompatible/chemistry; Coated Materials, Biocompatible/pharmacology; Collagen Type I/chemistry; Collagen Type I/pharmacology; Drug Stability; Fibroblast Growth Factor 2/chemistry; Fibroblast Growth Factor 2/pharmacology; Fibroblasts/drug effects; Fibroblasts/physiology; Humans; Hydrogel, Polyethylene Glycol Dimethacrylate/chemical synthesis; Hydrogel, Polyethylene Glycol Dimethacrylate/pharmacology; Materials Testing; Methylmethacrylates/chemical synthesis; Methylmethacrylates/chemistry; Methylmethacrylates/pharmacology; Models, Biological; Polyhydroxyethyl Methacrylate/chemical synthesis; Polyhydroxyethyl Methacrylate/chemistry; Polyhydroxyethyl Methacrylate/pharmacology; Surface Properties; Toxicity Tests