2866
The expression of 12 developmentally regulated gene targets ( nanog , fgf5 , gsc , cd34 , axin2 , apln , chst7 , lhx1 , fgf8 , sox17 , foxa2 , and cxcr4 ) was measured following exposure of embryoid bodies to a single compound concentration ( 0 . 1 x the cytotoxicity IC ( 20 ) ) for 4 days .
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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:
 None