25354
SUBJECTS : A total of 269 men and women with a mean +/- SD age of 81 +/- 6 years , mean serum creatinine concentration ( Scr ) of 1 . 1 +/- 0 . 4 mg / dl , and mean 24 - hour measured creatinine clearance ( mClcr ) of 53 +/- 13 ml / minute .
 Chemical: creatinine; Chemical: creatinine
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: creatinine