667
Sex steroid regulation of the production of this molecule, as well as other cytokines , may help explain the gender-specific differences in the immune system , including autoimmunity .
 protein: cytokines
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
Answer:
 protein: cytokines