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Increased platelet - derived growth factor production and intimal thickening during healing of Dacron grafts in a canine model .
 GENE: platelet - derived growth factor
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: GENE 
Text: {0} 
Answer:
 GENE: platelet - derived growth factor