3248
We report here on a heretofore undescribed respiratory syncytial virus ( RSV ) infection in a patient with a long - standing history of refractory CLL that was treated with fludarabine phosphate .
 adverse effect: respiratory syncytial virus ( RSV ) infection, fludarabine phosphate
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:  respiratory syncytial virus ( RSV ) infection, fludarabine phosphate 
Answer:
 adverse effect: respiratory syncytial virus ( RSV ) infection, fludarabine phosphate