2771
It is suggested that the use of endogenous creatinine clearance to estimate the glomerular filtration rate ( GFR ) requires caution and the recognition of the limitations of the method , and that simpler techniques ( serum creatinine or estimated endogenous creatinine clearance ) are preferable in routine practice .
 None
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: GENE 
Text: {0} 
 Entities:  
Answer:
 None