3618
This process runs in parallel with alterations of other forms of cell - to - cell communication , thus suggesting that toxic AhR agonists may simultaneously abrogate contact inhibition and reduce GJIC , two essential mechanisms linked to deregulation of cell - to - cell communication during tumor promotion and progression .
 None
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 None