19578
Mean minimum serum tocilizumab concentration at steady state was greater than the EC50 ( concentration at which 50 % of Emax on DAS28 is reached ) with the 8 - mg / kg dose but not with the 4 - mg / kgdose .
 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