24642
Knocking down BV8 in human myeloid leukemia cells inhibits STAT3 activity and expression of STAT3 - downstream angiogenic and pro - proliferation / survival genes , leading to a decrease in tumor cell viability .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
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