671
In a retrospective analysis of data from 35 cases with malignant lymphoma from a cohort of 2017 HIV - infected patients , the stage of HIV - disease , the CD4 counts at the time of diagnosis , and the use of antineoplastic agents or radiotherapy were correlated with outcome .
 CD4
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
 CD4