3080
Ototoxicity occurred in four ( 9 . 5 % ) of 42 netilmicin and piperacillin and in 12 ( 22 % ) of 54 tobramycin and piperacillin - treated patients .
 Disease: Ototoxicity; Chemical: netilmicin; Chemical: piperacillin; Chemical: tobramycin; Chemical: piperacillin
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 Disease: Ototoxicity; Chemical: netilmicin; Chemical: piperacillin; Chemical: tobramycin; Chemical: piperacillin