1170
Subjects were receiving desferrioxamine ( DFO ) chelation treatment with a mean daily dose of 50 - 60 mg / kg , 5 - 6 days a week during the first six years of the study , which was then reduced to 40 - 50 mg / kg for the following eight years .
 Chemical: desferrioxamine; Chemical: DFO
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Disease, Chemical 
Text: {0} 
 Entities: desferrioxamine, DFO 
Answer:
 Chemical: desferrioxamine; Chemical: DFO