1683
PROCEDURE : To investigate the effect of p75 expression in NB , we transfected the p75 cDNA into SH - SY5Y cells , an NB cell line lacking expression of both p75 and TrkA .
 NB, SH - SY5Y cells, NB cell line
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Anatomy 
Text: {0} 
Answer:
 NB, SH - SY5Y cells, NB cell line