3747
The role of the renin - - angiotensin system in the maintenance of blood pressure during halothane anesthesia and sodium nitroprusside ( SNP ) - induced hypotension was evaluated .
 angiotensin, halothane, sodium nitroprusside, SNP, hypotension
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 angiotensin, halothane, sodium nitroprusside, SNP, hypotension