12530
The failure of therapy with disopyramide and mexiletine to reproduce this observation suggests either a previously unreported electrophysiologic effect of , or idiosyncratic response to , procainamide .
 adverse effect: electrophysiologic effect, procainamide
Given options, please tell me the relationships of all the listed entity pairs.Output format is "relation1: word1, word2; relation2: word3, word4". 
Option: adverse effect 
Text: {0} 
 Entity Pairs:  electrophysiologic effect, procainamide 
Answer:
 adverse effect: electrophysiologic effect, procainamide