18606
Most functions of VEGF that are essential for proper brain development are , in fact , dispensable in the adult brain as was clearly demonstrated using a conditional brain - specific VEGF loss - of - function ( LOF ) approach .
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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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