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To test the hypothesis that 20 - HETE increases endothelial cell ( EC ) proliferation via vascular endothelial growth factor ( VEGF ) , we studied the effects of WIT003 [ 20 - hydroxyeicosa - 5 ( Z ) , 14 ( Z ) - dienoic acid ] , a 20 - HETE analog on human macrovascular or microvascular EC .
 endothelial cell, EC, macrovascular, microvascular EC
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Anatomy 
Text: {0} 
Answer:
 endothelial cell, EC, macrovascular, microvascular EC