4040
Together , these data further establish the involvement of endothelial PECAM - 1 in angiogenesis and suggest that , in vivo , PECAM - 1 may stimulate endothelial cell motility by promoting the formation of filopodia .
 endothelial, endothelial cell, filopodia
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Anatomy 
Text: {0} 
Answer:
 endothelial, endothelial cell, filopodia