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Cytotoxicity of (A, B) PC3 cells incubated with K60L20 gold nanoshells irradiated with a 200-mW, 808-nm laser diode and (C, D) PC3 cells only irradiated with the near-infrared laser. Live cells are stained green (A, C), and dead cells are stained red (B, D). Scale bar = 1 mm.
