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SS rats had lower plasma testosterone concentrations than CTL rats ( p = 0 . 05 ) , but did not differ in androgen receptor , estrogen receptor alpha , or Fos immunoreactive cell counts in the medial preoptic area .
 Chemical: testosterone; Chemical: androgen; Chemical: estrogen
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: testosterone; Chemical: androgen; Chemical: estrogen