21-Gene Assay to Inform Chemotherapy Benefit in Node-Positive Breast Cancer.
N Engl J Med. 2021 Dec 16;385(25):2336-2347. doi: 10.1056/NEJMoa2108873. Epub 2021 Dec 1.
N Engl J Med. 2021.
PMID: 34914339
Free PMC article.
Clinical Trial.