22689
Using focused ultrasound ( fUS ) in combination with circulating microbubbles ( MBs ) leads to temporary localized tissue permeabilization allowing extravasation of ( macro ) molecules from the vascular system .
 None
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 None