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The changes of CD 4 + cells were caused by the decrease of suppressor - inducer T - cells ( CD 4 + Leu 8 + ) .
 CD 4 + cells, suppressor - inducer 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 - inducer T - cells