5136
Uncultured peripheral blood T - cells from human T - cell leukemia - lymphoma virus - infected individuals expressed DR antigens at a low level , and the DR alpha locus was partially unmethylated .
 peripheral blood T - cells
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Anatomy 
Text: {0} 
Answer:
 peripheral blood T - cells