2106
MATERIAL AND METHODS : A total of 33 patients successfully treated with PTRA ( PTRA group , mean age 70 + / - 12 years , 23 female , basal creatinine 1 . 46 + / - 0 . 79 , range 0 . 7 - 4 . 9 mg / dl ) were compared with 33 patients undergoing successful PCI ( PCI group ) , matched for basal creatinine ( 1 . 44 + / - 0 . 6 , range 0 . 7 - 3 . 4 mg / dl ) , gender , and age .
 Chemical: creatinine; 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; Chemical: creatinine