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Audio Interchange File Format  |  1996-12-09  |  324.9 KB  |  1 channel  |  11,025 sample rate  |  15 seconds
Transcription: Photodynamic therapy. The injection of a light sensitizing chemical or dye and the subsequent application of light, usually laser, to a tumor. The chemical improves the effect of the laser treatment and thus minimizes or prevents damage to normal tissues.