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Photodynamic therapy ( PDT ) is a novel treatment entity that exploits the photophysical properties of various photosensitive chemical entities which , upon light activation , results in targeted photooxidation and subsequent tissue destruction .
 Anatomy: tissue
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Anatomy 
Text: {0} 
Answer:
 Anatomy: tissue