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Comparison of drug loading capacity and extended releasing properties of the composite hydrogels and other hydrogel delivery systems. The extended release is quantified by the time at which 50% of the loaded drug is released. The composite hydrogels (marked with red arrow) outperform existing hydrogel delivery systems (light blue area) in terms of drug loading and extended releasing properties. The reference number for each data point is as labeled (14,22,30–33,46–48).
