3326
Auditory deterioration and improvement , demonstrated serially in individual patients receiving and not receiving deferoxamine , respectively , provided convincing evidence for a cause - and - effect relation between deferoxamine administration and ototoxicity .
 deferoxamine, deferoxamine, ototoxicity
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 deferoxamine, deferoxamine, ototoxicity