19805
HENA failed to dilate the arteries from the KCNMB1 knockout mouse , underscoring BK beta 1 ' s role in HENA action .
 HENA, HENA
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 HENA, HENA