Disparities in Biopsy Practice in Metastatic Breast Cancer Patients Managed in Community Oncology Practices in the United States: Implications for Guideline-Concordant Care.

George Dranitsaris, Heather Neuhalfen, Nik Seifter, Aaron Peevyhouse, Lee Ann Dietz, Ajithkumar Puthillath, Gene Felber, Julie Katz, Sibel Blau