28393
MEASUREMENTS AND MAIN RESULTS : The primary outcome was development of renal dysfunction , defined as an increase in serum creatinine of 50 % or more during therapy or the initiation of renal replacement therapy ( RRT ) , in patients who received at least one dose of colistin and were not already on RRT .
 Chemical: creatinine; Chemical: colistin
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: colistin