Baseline characteristics of the two datasets used in this analysis.

The second column compares the dataset A with the original previously published global trial population. # as previously published in Baselga et al, JCO 2009 [11] (original cohort of which the Dataset A is a subset); Dataset B published by Sabine et al, BCR 2010 [13]. **As previously defined in Dowsett et al (CCR 2007) [9];