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In PHA -activated PBL , no age-related differences were observed in c-fos or jun B mRNA expression .
 cell line: PHA -activated PBL; protein: PHA
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:
 cell line: PHA -activated PBL; protein: PHA