Table 2. qRT-PCR verification of masked and non-masked microarray data.

category	naive	gDNA	0 mm	1 mm
(A)	0.91	0.93	0.98	0.98
(B)	0.82		0.95	0.96
(C)	0.83	0.87		0.94
(D)	0.78			0.92

Pearson correlation coefficients of (i) the expression responses resulting from the three masking approaches and the naive approach, and (ii) the expression responses resulting from qRT-PCR of the genes of category A, B, C, and D (Methods Candidate selection). We find that the 1 mm approach and the 0 mm approach yield similar Pearson correlation coefficients that are higher than those of the gDNA approach and the naive approach.