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In vivo mobility of hydrogels. In vivo fluorescence images of free Cy7 resuspended in saline, a non-crosslinked Cy7-labeled HA hydrogel (2.5% w/v HA, non-crosslinked) or the crosslinked hydrogel (2.5% w/v HA, 3.5 mol % DTPH) labeled with Cy7, imaged at 3 h after intraperitoneal injection in mice; n = 2 mice per group. The experiment was performed once.

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