Table 1.

Samples studied. All primary samples were de‐identified. PBMC: peripheral blood mononuclear cells

Sample	Type	Malignancy	N	Age (range)
Cell line	BT474	Yes	1	60
	HCC1954	Yes	1	61
	MCF‐7	Yes	1	69
	MDA‐MB‐231	Yes	1	51
	Benign breast	No	4	Undisclosed
Primary isolate	PBMC	No	3	Undisclosed
FFPE	Mixed human breast cancers	Yes	26	34–79
	Normal breast tissue	No	3	19–21
Total			40