Wolff Wolff AC AC Hammond Hammond MEH MEH Allison Allison KH KH Human epidermal growth factor receptor 2 testing in breast cancer: American Society of Clinical Oncology/College of American Pathologists clinical practice guideline focused update Human epidermal growth factor receptor 2 testing in breast cancer: American Society of Clinical Oncology/College of American Pathologists clinical practice guideline focused update J Clin Oncol J Clin Oncol 2018 2018 36 36 20 20 2105 2105 2122 2122 10.1200/JCO.2018.77.8738 10.1200/JCO.2018.77.8738 supplied-pmid 29846122? This evidence concerns the gene ERBB2 and breast cancer.