25591
Ultrasound has been previously exploited for targeted release of OV in vivo , but its use to induce cavitation , microbubble oscillations , for enhanced OV tumor extravasation and delivery has not been previously reported .
 None
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 None