8127
Taken together, these results suggest that NF-kappa B plays a crucial role in ensuring the differentiation and survival of thymocytes in the early stages of their development.
 NF-kappa B, thymocytes
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
Answer:
 NF-kappa B, thymocytes