2725
All of the patients ' plasma blood urea nitrogen ( BUN ) and creatinine levels were measured on the second and seventh day after the administration of intravenous contrast material .
 Chemical: blood urea nitrogen; Chemical: BUN; Chemical: creatinine; Chemical: contrast
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:
 Chemical: blood urea nitrogen; Chemical: BUN; Chemical: creatinine; Chemical: contrast