23033
Testicular Growth and Regression Are Not Correlated With Dio2 Expression in a Wild Male Songbird , Sturnus vulgaris , Exposed to Natural Changes in Photoperiod .
 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