Table 3. Previous published studies which evaluated EBNA-1 by IHC on breast cancer specimens.

First author, year	EBNA-1 positive/Total	% of cells stained
Bonnet[10] 1999	9/9*	5–30
Brink[27] 2000	1/5*	NA
Chu[31]2001	12/48	<1
Grinstein[15] 2002	14/33	5–30
Deshpande [32]2002	0/43	0
Hermann [7]2003	0/59	0
Roberio-Silva[14] 2004	29/73	NA
Preciado [12] 2005	24/69	5–60
Shereen Fawzy[13] 2008	10/40	5–60

^*IHC was done on EBV-DNA PCR positive samples only.