4198
The toxicity and plasma concentrations of ifosfamide , chloroacetaldehyde , and 4-hydroxyifosfamide were then determined over 24 h after a single 1.6 g / m2 dose of ifosfamide .
 toxicity, 4-hydroxyifosfamide; toxicity, chloroacetaldehyde; toxicity, ifosfamide; toxicity, ifosfamide
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:
 toxicity, 4-hydroxyifosfamide; toxicity, chloroacetaldehyde; toxicity, ifosfamide; toxicity, ifosfamide