1883
RESULTS: BZLF1 ( ZEBRA ) or early gene products ( EA-R and EA-D/BHLF1/NotI ) were detected in a small proportion (< 0.01-5%) of tumour cells in eight of these 17 cases by immunohistochemistry and in situ hybridization .
 BZLF1, EA-D/BHLF1/NotI, EA-R, tumour cells, ZEBRA, early gene products
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
Answer:
 BZLF1, EA-D/BHLF1/NotI, EA-R, tumour cells, ZEBRA, early gene products