Table 3. Guardant360 gene copy number validation results.

Low/High levels of amplification refer to 3–4 or >9 copy numbers, respectively.

Cell Line	Gene	Expected Level of Amplification	Guardant360 Absolute Gene Copy Number	Concordant? (Y/N)
A431	EGFR	High	11.94	Y
AU565	ERBB2	High	17.92	Y
BT474	ERBB2	High	15.14	Y
CAL27	EGFR	Low	3.76	Y
HCC827	EGFR	High	36.85	Y
HCC2218	ERBB2	High	16.32	Y
NCI-H1648	MET	High	8.19	Y
NCI-H1993	MET	High	30.29	Y
NCI-H2009	MET	Low	2.87	Y