Table 4.

Liver cancer studies

Data set	D1	D2	D3	D4
Experimenter	Hospital A	Hospital B	Hospital C	Hospital C
Tumor	16 (14)	23	29	12 (10)
Normal	16 (14)	23	5	9 (7)
Chip type	cDNA (Ver. 1)	cDNA (Ver. 1)	cDNA (Ver. 1)	cDNA (Ver. 2)
(Cy5:Cy3)	Sample:normal liver	Sample:placenta	Sample:placenta	Sample:sample

Tumor, number of tumor samples; Normal, number of normal samples.

Numbers in the brackets are the number of subjects used in analysis. Ver. 2 chips have different spot locations from Ver. 1 chips.