10127
After gastric - outlet obstruction was recognized in several infants who received prostaglandin E1 , we studied the association between the drug and this complication .
 adverse effect: gastric - outlet obstruction, prostaglandin E1
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:  gastric - outlet obstruction, prostaglandin E1 
Answer:
 adverse effect: gastric - outlet obstruction, prostaglandin E1