1250
We report two cases of tenofovir ( TDF ) - associated nephrotoxicity in perinatally HIV - infected adolescents .
 adverse effect: nephrotoxicity, TDF; adverse effect: nephrotoxicity, tenofovir
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:  nephrotoxicity, TDF; nephrotoxicity, tenofovir 
Answer:
 adverse effect: nephrotoxicity, TDF; adverse effect: nephrotoxicity, tenofovir