1470
Taken together , our data indicate that in VHL disease , therapy directed at inhibition of constitutively expressed VEGF induction of angiogenesis by VHL tumors may constitute an effective medical treatment .
 VHL tumors
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Anatomy 
Text: {0} 
Answer:
 VHL tumors