3914
Bmi - 1 over - expression in neural stem / progenitor cells increases proliferation and neurogenesis in culture but has little effect on these functions in vivo .
 neural stem / progenitor cells
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Anatomy 
Text: {0} 
Answer:
 neural stem / progenitor cells