1415
After 1 week of treatment , before an increase in capillary length density , VEGF mRNA increased greater than 2 - fold and then declined to control levels after 3 weeks of treatment .
 capillary
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Anatomy 
Text: {0} 
Answer:
 capillary