24339
In this model , loss of PD - 1 , but not PD - L1 , on the antigen - specific CD4 ( + ) T cell resulted in increased cell numbers in the spleen , pancreas - draining lymph node and pancreas .
 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