2109
Changes in serum creatinine after intervention ( after - before ) were significantly different between the PTRA and PCI groups ( - 0 . 12 + / - 0 . 5 vs . 0 . 13 + / - 0 . 3 , P = 0 . 014 ) .
 Chemical: creatinine
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: creatinine