23372
Administration of nephrotoxic drugs ( odds ratio 2 . 23 , Confidence Interval 1 . 27 - 3 . 93 ) and presence of high blood urea nitrogen ( BUN ) : Scr ratio before vancomycin therapy ( p < 0 . 05 ) were associated with AKI .
 urea, nitrogen, vancomycin
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 urea, nitrogen, vancomycin