3885
In conclusion , viable excised human intestine mounted in the Ussing chamber , is a powerful technique for predicting regional fraction absorbed ( f ( a ) ) , transporter - mediated uptake or efflux as well as intestinal metabolism of drug candidates in man .
 None
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:  
Answer:
 None