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Biocompatibility of human outgrowth endothelial cells (OEC) with injectable chitosan-collagen hydrogels containing different fucoidan concentrations. (a) OEC were cultured on top of the hydrogels (2D culture), (b) OEC were encapsulated into the hydrogels (3D culture). Vital (green) and dead (red) 2D- and 3D-cultured cells were visualized on day two and six using CalceinAM and propidium iodide staining, respectively. Scale bars = 200 µm.
