TY - JOUR AU - Sparano, J A; Gray, R J; Makower, D F TI - Adjuvant Chemotherapy Guided by a 21-Gene Expression Assay in Breast Cancer JO - N Engl J Med VL - 379 PY - 2018 DO - 10.1056/NEJMoa1804710 L3 - PubMed-ID: 29860917 SP - 111 EP - 121 ER -