780
The effects of diltiazem were stereoselective , thus the potentiation induced by d - cis diltiazem was significantly greater in all cases than that induced by l - cis diltiazem , which suggests that calcium channel blockade plays a role in these interactions .
 None
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
 None