9577
Methotrexate ( MTX ) is a commonly used second line agent for RA , and there have been several recent reports of Epstein - Barr virus ( EBV ) - associated polyclonal B cell lymphoproliferative disorder in MTX - treated RA patients .
 adverse effect: Epstein - Barr virus ( EBV ) - associated polyclonal B cell lymphoproliferative disorder, Methotrexate; adverse effect: Epstein - Barr virus ( EBV ) - associated polyclonal B cell lymphoproliferative disorder, MTX; adverse effect: Epstein - Barr virus ( EBV ) - associated polyclonal B cell lymphoproliferative disorder, MTX
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:  Epstein - Barr virus ( EBV ) - associated polyclonal B cell lymphoproliferative disorder, Methotrexate; Epstein - Barr virus ( EBV ) - associated polyclonal B cell lymphoproliferative disorder, MTX; Epstein - Barr virus ( EBV ) - associated polyclonal B cell lymphoproliferative disorder, MTX 
Answer:
 adverse effect: Epstein - Barr virus ( EBV ) - associated polyclonal B cell lymphoproliferative disorder, Methotrexate; adverse effect: Epstein - Barr virus ( EBV ) - associated polyclonal B cell lymphoproliferative disorder, MTX; adverse effect: Epstein - Barr virus ( EBV ) - associated polyclonal B cell lymphoproliferative disorder, MTX