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Possible relationship between the changes in IL-1 and GR in aged long-distance runner and its physiological significance are discussed.
 protein: GR; protein: IL-1
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
Answer:
 protein: GR; protein: IL-1