http://breast-cancer-research.com/content/10/1/R3
please see the sections on effect of her2 on 5 yr DFS, and effect of pAKT on 5 yr survival
Study on 141 tumors --patients all of Afro-American and Hispanic descent
If there was a tumor registry, they could quickly examine this in larger numbers of patients and perhaps it could become an acknowledged biomarker earlier, if warranted