19977
Serum levels of some hematopoietic growth factors significantly changed in 8 mu g / kg bw group , mainly including granulocyte - macrophage ( GM - CSF ) , erythropoietin ( EPO ) , interleukin - 3 ( IL - 3 ) and TNF - alpha .
 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