9916
One possible caveat is that , with only a few exceptions , experiments have generally been performed in xenograft models , thereby eliminating the involvement of the immune system , which might ultimately be proven to play a central role in determining the effectiveness of autophagy inhibition in chemosensitization or radiosensitization .
 None
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 None