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In breast cancer cell lines , the protein expression level of reduced folate carrier 1 ( RFC1 ) was directly correlated with methotrexate ( MTX ) sensitivity .
 Chemical: methotrexate; Chemical: MTX
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: methotrexate; Chemical: MTX