1271
His symptoms of brain stem compression were alleviated and the role of phenytoin in the production of his craniocervical abnormality is discussed .
 craniocervical abnormality, phenytoin
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:
 craniocervical abnormality, phenytoin