234
( 5 ) No changes were observed in the gastric venous blood flow by continuous intravenous injection of cimetidine , but by rapid injection both the flow was augmented and the systemic blood pressure decreased transiently .
 None
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
 None