18858
ACT - SNAIL cells showed slightly but significantly enhanced tumor formation ability in in vitro sphere assay ( ~ 3 fold ) but not in vivo subcutaneous tumor growth assay , and showed comparable chemosensitivity , as compared to the parental ACT - 1 cells .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
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