2825
Plasma prolactin concentrations during incubation , 25 . 8 + / - 2 . 3 ng / ml , decreased to baseline levels , 10 . 8 + / - 1 . 9 ng / ml , within 24 hr after nestbox removal .
 GENE: Plasma prolactin
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: GENE 
Text: {0} 
Answer:
 GENE: Plasma prolactin