| CPC A61K 47/6935 (2017.08) [A61K 47/10 (2013.01); A61K 47/34 (2013.01); C08L 33/06 (2013.01); A61K 47/32 (2013.01); C08L 33/20 (2013.01); C08L 33/26 (2013.01); C08L 2203/02 (2013.01)] | 19 Claims |

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1. A kit for diagnosing or treating a disease or an injury characterized by elevated production of free radicals, comprising:
a first conjugate comprising a first linear or multi-arm polymer covalently linked to one or more optionally substituted reactive alkene addition-reaction functional groups, wherein the reactive alkene functional groups react intermolecularly to form a cross-linked polymer network after being exposed in vivo to an elevated level of free radicals associated with the disease or injury,
wherein the polymer further comprises:
a first cycloaddition functional group;
and
optionally a first cleavable linkage;
a second conjugate comprising a second linear or multi-arm polymer covalently linked to a therapeutic or a diagnostic agent and a second cycloaddition functional group complementary to the first cycloaddition functional group for cycloaddition reaction to occur, optionally wherein the second polymer comprises a second cleavable linkage.
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