9255
Over the past 10years , the number of percutaneous coronary intervention ( PCI ) procedures performed in the United States has increased by 33 % ; however , restenosis , which inhibits complete functional recovery of the vessel wall , remains a complication of this procedure .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
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