Piccart-Gebhart Piccart-Gebhart MJ MJ Procter Procter M M Leyland-Jones Leyland-Jones B B Trastuzumab after adjuvant chemotherapy in HER2-positive breast cancer Trastuzumab after adjuvant chemotherapy in HER2-positive breast cancer N Engl J Med N Engl J Med 2005 2005 353 353 16 16 1659 1659 1672 1672 10.1056/NEJMoa052306 10.1056/NEJMoa052306 supplied-pmid 16236737? This evidence concerns the gene ERBB2 and breast cancer.