1957
Verapamil in effort - induced angina pectoris in patients with normal coronary arteries .
 angina pectoris, Verapamil
Please list all entity pairs containing a certain relationship in the given options.Output format is "word1, word2; word3, word4". 
Option: adverse effect 
Text: {0} 
Answer:
 angina pectoris, Verapamil