2050
Two of the three groups were administered dauricine , as a new calcium channel blocker , and verapamil , as a generally recognized calcium channel blocker , respectively , from 15 minutes pre - bypass to the end of the bypass procedure ( a period of 95 minutes ) .
 None
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
 None