When you say adjuvant chemotherapy 'seems' to be useful in breast cancer, what exactly do you mean? How does a meta-analysis of 20,000 patients in randomized co

When you say adjuvant chemotherapy 'seems' to be useful in breast cancer, what exactly do you mean? How does a meta-analysis of 20,000 patients in randomized controlled trials showing a persistent reduction in risk of recurrence and death equate to 'seeming'? http://www.ncbi.nlm.nih.gov/pubmed/25917869 http://www.ncbi.nlm.nih.gov/pubmed/25917869