5671
Given that discontinuation of nitrofurantoin and introduction of methylprednisolon therapy significantly lowered liver enzyme levels , restoring most of them to normal , we concluded that this was probably the case of toxic liver damage caused by nitrofurantoin .
 adverse effect: toxic liver damage, nitrofurantoin
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:  toxic liver damage, nitrofurantoin 
Answer:
 adverse effect: toxic liver damage, nitrofurantoin