29682
With magnetic transport guidance toward the target and subsequent exposure to alternating magnetic field , this DOX - loaded nanogel system possessing combined capabilities of hyperthermia and stimuli - triggered drug release showed superior in vitro cytotoxicity against HeLa cells as compared to the case with only free drug or hyperthermia alone .
 None
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 None