4262
Controlled hypotension in groups A and C was induced with PGE1 to maintain mean arterial blood pressure at 55 mmHg for 180 min .
 hypotension, PGE1
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 hypotension, PGE1