5009
Further , the inhibition of EGF binding by tumor promoters following long - term treatment of Swiss 3T3 cells with PDBu also varied with growth state .
 tumor, Swiss 3T3 cells
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Anatomy 
Text: {0} 
Answer:
 tumor, Swiss 3T3 cells