1879
DESIGN: Retrospective study based on immunohistochemistry and in situ hybridization to detect EBV replicative gene products in tissue samples from patients affected by ARNHL and correlation with CD4+ cell counts and results of EBV serology (including anti- ZEBRA activity ) in sera from the same patients .
 protein: ZEBRA; protein: CD4+
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
 Entities: ZEBRA, CD4+ 
Answer:
 protein: ZEBRA; protein: CD4+