4111
The second patient experienced mild nitritoid symptoms following several GSTM injections prior experiencing a cerebrovascular accident within several hours of her next injection .
 mild nitritoid symptoms, GSTM
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:
 mild nitritoid symptoms, GSTM