20129
However , the greatest expectations are in the field of SR based radiotherapy , increasingly studies are demonstrating SR radiotherapy provides improved chances of recovery ; this is especially the case for pediatric patients .
 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