12572
Using genome - wide siRNA screening , targets that regulate hepatocyte ApoA - I secretion were identified through transfection of 21 , 789 siRNAs into hepatocytes whereby cell supernatants were assayed for ApoA - I .
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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