3001
The prolonged immune deficiency after BMT might be related to either deficient expression of homing receptor ( Leu 8 antigen ) on CD 4 + cells or increased suppressor T - cells ( CD 8 + CD 11 + ) .
 CD 4 + cells, suppressor T - cells
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Anatomy 
Text: {0} 
Answer:
 CD 4 + cells, suppressor T - cells