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Contemporary photodynamic therapy (PDT) for the last-line treatment of refractory cancers such as nasopharyngeal carcinomas, superficial recurrent urothelial carcinomas, and non-resectable extrahepatic cholangiocarcinomas yields poor clinical outcomes and may be associated with adverse events. This is mainly attributable to three factors: (1) the currently employed photosensitizers exhibit suboptimal...
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