29548
PATIENTS : Hospitalized nonsurgical patients 18 years or older who received at least one dose of warfarin according to the pharmacist - managed protocol from January 1 , 2009 , to January 31 , 2012 , were included .
 Chemical: warfarin
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities: warfarin 
Answer:
 Chemical: warfarin