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 .
 desferrioxamine, DFO
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 desferrioxamine, DFO