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Treatment with gefitinib induced cytotoxicity in various human cancer cell types , including RKO ( colon cancer ) , A549 ( lung cancer ) , BFTC905 ( bladder cancer ) , MCF7 ( breast cancer ) and A375 ( skin cancer ) .
 Chemical: gefitinib
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: gefitinib