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CONCLUSION : These findings imply that eotaxin either is mechanistically involved in acute asthma or serves as a biomarker for activity of the CCR3 receptor ligand system , which is functionally linked to asthma .
 CCR3 receptor ligand
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
 CCR3 receptor ligand