24275
In in vivo MRI experiments on mice subcutaneously grafted with colon - 26 tumor cells , the tumor signal was significantly altered at 3h after SPIO - Cy5 - PICsome administration and persisted for at least 24h .
 None
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities:  
Answer:
 None