Table 1.

Breast cancer prognosis studies.

Reference	Platform	Gene	Sample
Sorlie et al. [47]	cDNA	8102	58
van't Veer et al. [5]	Oligonucleotide	24481	78
Huang er al. [48]	Affymetrix	12625	71
Sotiriou et al. [17]	cDNA	7650	98

Platform: platforms used for profiling; Gene: number of gene expressions measured; Sample: sample size.