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Nerve growth factor ( NGF ) has been demonstrated to support survival and differentiation of neuroblastoma ( NB ) cells by activation of the TrkA receptor .
 neuroblastoma ( NB ) cells
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Anatomy 
Text: {0} 
Answer:
 neuroblastoma ( NB ) cells