24670
PURPOSE : The aim of this study was to evaluate the association of PON1 genetic variants with the susceptibility to coronary artery disease ( CAD ) and with the clinical endpoints in aspirin and clopidogrel ( dual antiplatelet therapy ) - treated Han Chinese patients with CAD after percutaneous coronary intervention ( PCI ) .
 Chemical: aspirin; Chemical: clopidogrel
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: aspirin; Chemical: clopidogrel