22113
Collectively these data demonstrate that early life oral exposure to BPA at levels well below the current No Observed Adverse Effect Level ( NOAEL ) of 50mg / kg / day can alter sex specific hypothalamic morphology in the rat .
 BPA
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 BPA