Table 5

Breast cancer gene expression datasets used in this study

Number of samples

Dataset ID

Reference

Array type

ER⁺

ER^-

HE

Hess et al. [44]

One channel oligo

82

51

MI

Miller et al. [38]

One channel oligo

213

34

MN

Minn et al. [39]

One channel oligo

57

42

VA

van't Veer et al. [34]

Two channels cDNA

53

44

WA

Wang et al. [40]

One channel oligo

209

77

Cheng et al. Genome Biology 2009 10:R90   doi:10.1186/gb-2009-10-9-r90