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In vitro PDT of PEG-Ce 6 nanomicelles. (a) Relative viabilities of 4T1 cells treated by PEG-Ce 6 nanomicelles under 658 nm light exposure with various power density for 15 min. n = 4. (b) Trypan blue stained 4T1 cells with PBS or PEG-Ce 6 nanomicelles incubation after being exposed to the 658 nm laser, with blue indicating dead cells.
