2470
Herpes virus infection was characterized by inversion of the T4 / T8 ratio below 1 . 0 ( sensitivity 90 % , specificity 88 % ) , caused by proliferation of the T8 subpopulation , which - - compared with the findings in patients with rejection crises - - was significantly raised ( P less than 0 . 001 ) .
 None
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
 None