4704
Our review of 194 RA patients and 38 PsA patients receiving MTX has identified four RA patients and one PsA patient with MTX - induced pneumonitis , giving a prevalence of 2.1 % and 0.03 % , respectively .
 pneumonitis, MTX
Please list all entity pairs containing a certain relationship in the given options.Output format is "word1, word2; word3, word4". 
Option: adverse effect 
Text: {0} 
Answer:
 pneumonitis, MTX