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We studied the expression of CXCR4 using RT - PCR , Western blotting , flow cytometry , and confocal microscopy in five gastric cancer cell lines .
 Anatomy: gastric cancer cell lines
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Anatomy 
Text: {0} 
Answer:
 Anatomy: gastric cancer cell lines