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CP group displayed a marked renal failure characterized by a significant increase in serum creatinine and blood urea nitrogen ( BUN ) levels in addition to severe histopathological and ultrastructural renal alterations .
 Chemical: creatinine; Chemical: urea; Chemical: nitrogen
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: creatinine; Chemical: urea; Chemical: nitrogen